Percentages of Original Class Principal (or Class Notional) Balances and Weighted Average Lives Security Group 1 PSA Prepayment Assumption Rates Class GA Class GB Class GC Class GD Distribution Date 0% 100% 170% 260% 400% 0% 100% 170% 260% 400% 0% 100% 170% 260% 400% 0% 100% 170% 260% 400% Initial Percent ..................    100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 October 2008....................    100 100 77 36 0 100 100 100 100 0 100 100 100 100 0 100 100 100 100 96 October 2009....................    100 100 58 0 0 100 100 100 17 0 100 100 100 100 0 100 100 100 100 0 October 2010....................    100 100 44 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2011....................    100 100 32 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2012....................    100 100 24 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2013....................    100 100 19 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2014....................    100 100 16 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2015....................    100 100 14 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2016....................    100 100 13 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2017....................    100 100 11 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2018....................    100 100 9 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2019....................    100 100 7 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2020....................    100 100 4 0 0 100 100 100 0 0 100 100 100 0 0 100 100 100 0 0 October 2021....................    100 100 0 0 0 100 100 85 0 0 100 100 100 0 0 100 100 100 0 0 October 2022....................    100 89 0 0 0 100 100 38 0 0 100 100 100 0 0 100 100 100 0 0 October 2023....................    100 74 0 0 0 100 100 0 0 0 100 100 88 0 0 100 100 100 0 0 October 2024....................    100 59 0 0 0 100 100 0 0 0 100 100 24 0 0 100 100 100 0 0 October 2025....................    100 42 0 0 0 100 100 0 0 0 100 100 0 0 0 100 100 69 0 0 October 2026....................    100 21 0 0 0 100 100 0 0 0 100 100 0 0 0 100 100 8 0 0 October 2027....................    100 2 0 0 0 100 100 0 0 0 100 100 0 0 0 100 100 0 0 0 October 2028....................    100 0 0 0 0 100 0 0 0 0 100 98 0 0 0 100 100 0 0 0 October 2029....................    100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 67 0 0 0 October 2030....................    100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2031....................    100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2032....................    100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2033....................    100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2034.................... 66 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2035.................... 10 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 October 2036.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2037.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (years)  ..................   27.3    17.4 3.8 0.8 0.4 28.3 20.5 14.8 1.9 0.8 28.6 21.3 16.6 2.2 1.0 28.8 22.2 18.3 2.6 1.1 PSA Prepayment Assumption Rates Class GE Class GH Classes MS, NS, PF, PO, PS, SI, US and VS Class YA Distribution Date 0% 100% 170% 260% 400% 0% 100% 170% 260% 400% 0% 100% 170% 260% 400% 0% 100% 170% 260% 400% Initial Percent ..................    100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 October 2008....................    100 100 100 100 100 100 100 100 100 100 98 89 89 89 89 100 100 78 78 78 October 2009....................    100 100 100 100 0 100 100 100 100 0 97 79 79 79 79 100 100 59 59 0 October 2010....................    100 100 100 92 0 100 100 100 100 0 95 69 69 69 59 100 100 43 43 0 October 2011....................    100 100 100 0 0 100 100 100 0 0 93 60 60 60 44 100 100 30 25 0 October 2012....................    100 100 100 0 0 100 100 100 0 0 91 52 52 52 32 100 100 20 0 0 October 2013....................    100 100 100 0 0 100 100 100 0 0 89 44 44 44 23 100 100 12 0 0 October 2014....................    100 100 100 0 0 100 100 100 0 0 87 36 36 36 16 100 100 7 0 0 October 2015....................    100 100 100 0 0 100 100 100 0 0 84 29 29 29 11 100 98 1 0 0 October 2016....................    100 100 100 0 0 100 100 100 0 0 81 24 24 24 8 100 87 0 0 0 October 2017....................    100 100 100 0 0 100 100 100 0 0 78 19 19 19 5 100 68 0 0 0 October 2018....................    100 100 100 0 0 100 100 100 0 0 75 15 15 15 3 100 43 0 0 0 October 2019....................    100 100 100 0 0 100 100 100 0 0 72 11 11 11 1 100 14 0 0 0 October 2020....................    100 100 100 0 0 100 100 100 0 0 68 8 8 8 0 100 0 0 0 0 October 2021....................    100 100 100 0 0 100 100 100 0 0 65 6 6 6 0 100 0 0 0 0 October 2022....................    100 100 100 0 0 100 100 100 0 0 61 4 4 4 0 100 0 0 0 0 October 2023....................    100 100 100 0 0 100 100 100 0 0 56 2 2 2 0 100 0 0 0 0 October 2024....................    100 100 100 0 0 100 100 100 0 0 52 1 1 1 0 100 0 0 0 0 October 2025....................    100 100 100 0 0 100 100 100 0 0 47 0 0 0 0 100 0 0 0 0 October 2026....................    100 100 100 0 0 100 100 100 0 0 41 0 0 0 0 100 0 0 0 0 October 2027....................    100 100 59 0 0 100 100 100 0 0 35 0 0 0 0 100 0 0 0 0 October 2028....................    100 100 16 0 0 100 100 100 0 0 29 0 0 0 0 100 0 0 0 0 October 2029....................    100 100 0 0 0 100 100 0 0 0 23 0 0 0 0 100 0 0 0 0 October 2030....................    100 86 0 0 0 100 100 0 0 0 16 0 0 0 0 100 0 0 0 0 October 2031....................    100 15 0 0 0 100 100 0 0 0 8 0 0 0 0 100 0 0 0 0 October 2032....................    100 0 0 0 0 100 0 0 0 0 0 0 0 0 0 97 0 0 0 0 October 2033....................    100 0 0 0 0 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2034....................    100 0 0 0 0 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2035....................    100 0 0 0 0 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2036.................... 92 0 0 0 0 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 October 2037.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (years)  ..................   29.2    23.5    20.2 3.4 1.3 29.4 24.3 21.5 3.9 1.5 15.9 6.0 6.0 6.0 4.2 25.4 10.6 3.0 2.5 1.3 S-19