Percentages of Original Class Principal (or Class Notional) Balances and Weighted Average Lives Security Group 1 PSA Prepayment Assumption Rates Classes AB, AG, BA and IG Class AC Class AD Distribution Date 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% Initial Percent ..................    100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 October 2008....................    100 100 90 86 70 100 100 100 100 100 100 100 100 100 100 October 2009....................    100 100 67 56 7 100 100 100 100 100 100 100 100 100 100 October 2010....................    100 100 41 22 0 100 100 100 100 0 100 100 100 100 0 October 2011....................    100 100 22 0 0 100 100 100 94 0 100 100 100 100 0 October 2012....................    100 100 10 0 0 100 100 100 21 0 100 100 100 100 0 October 2013....................    100 100 2 0 0 100 100 100 0 0 100 100 100 43 0 October 2014....................    100 100 0 0 0 100 100 94 0 0 100 100 100 0 0 October 2015....................    100 100 0 0 0 100 100 85 0 0 100 100 100 0 0 October 2016....................    100 100 0 0 0 100 100 74 0 0 100 100 100 0 0 October 2017....................    100 100 0 0 0 100 100 63 0 0 100 100 100 0 0 October 2018....................    100 100 0 0 0 100 100 52 0 0 100 100 100 0 0 October 2019....................    100 100 0 0 0 100 100 41 0 0 100 100 100 0 0 October 2020....................    100 100 0 0 0 100 100 31 0 0 100 100 100 0 0 October 2021....................    100 92 0 0 0 100 100 22 0 0 100 100 100 0 0 October 2022....................    100 83 0 0 0 100 100 14 0 0 100 100 100 0 0 October 2023....................    100 74 0 0 0 100 100 7 0 0 100 100 100 0 0 October 2024....................    100 65 0 0 0 100 100 0 0 0 100 100 100 0 0 October 2025....................    100 57 0 0 0 100 100 0 0 0 100 100 82 0 0 October 2026....................    100 48 0 0 0 100 100 0 0 0 100 100 67 0 0 October 2027....................    100 40 0 0 0 100 100 0 0 0 100 100 53 0 0 October 2028....................    100 32 0 0 0 100 100 0 0 0 100 100 42 0 0 October 2029....................    100 24 0 0 0 100 100 0 0 0 100 100 32 0 0 October 2030....................    100 17 0 0 0 100 100 0 0 0 100 100 25 0 0 October 2031....................    100 9 0 0 0 100 100 0 0 0 100 100 18 0 0 October 2032....................    100 3 0 0 0 100 100 0 0 0 100 100 13 0 0 October 2033.................... 91 0 0 0 0 100 81 0 0 0 100 100 9 0 0 October 2034.................... 65 0 0 0 0 100 50 0 0 0 100 100 6 0 0 October 2035.................... 38 0 0 0 0 100 20 0 0 0 100 100 3 0 0 October 2036.................... 8 0 0 0 0 100 0 0 0 0 100 71 1 0 0 October 2037.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (years)  ..................   27.5 18.9 2.8 2.2 1.3 29.6 27.0 11.3 4.6 2.2 29.9 29.2 21.0 6.0 2.4 PSA Prepayment Assumption Rates Classes DA and IO Classes DO, FP and PS Classes FA and SA Distribution Date 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% 0% 100% 295% 350% 600% Initial Percent ..................    100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 October 2008....................    100 100 93 93 93 98 95 95 95 95 99 97 94 93 89 October 2009....................    100 100 76 76 76 97 87 87 87 87 98 92 82 79 66 October 2010....................    100 100 55 55 0 95 75 75 75 70 97 86 67 62 42 October 2011....................    100 100 37 37 0 93 65 65 65 44 96 79 54 48 27 October 2012....................    100 100 23 23 0 91 54 54 54 27 95 74 44 37 17 October 2013....................    100 100 12 12 0 89 45 45 45 16 94 68 36 29 11 October 2014....................    100 100 3 3 0 86 36 36 36 9 92 63 29 23 7 October 2015....................    100 99 0 0 0 84 28 28 28 5 91 58 23 18 4 October 2016....................    100 92 0 0 0 81 21 21 21 2 89 53 19 14 3 October 2017....................    100 76 0 0 0 78 15 15 15 0 88 49 15 10 2 October 2018....................    100 55 0 0 0 75 11 11 11 0 86 45 12 8 1 October 2019....................    100 31 0 0 0 71 8 8 8 0 84 41 10 6 1 October 2020....................    100 4 0 0 0 67 5 5 5 0 82 38 8 5 0 October 2021....................    100 0 0 0 0 63 3 3 3 0 79 34 6 4 0 October 2022....................    100 0 0 0 0 58 1 1 1 0 77 31 5 3 0 October 2023....................    100 0 0 0 0 53 0 0 0 0 74 28 4 2 0 October 2024....................    100 0 0 0 0 48 0 0 0 0 71 25 3 2 0 October 2025....................    100 0 0 0 0 42 0 0 0 0 68 22 2 1 0 October 2026....................    100 0 0 0 0 36 0 0 0 0 64 20 2 1 0 October 2027....................    100 0 0 0 0 29 0 0 0 0 60 17 1 1 0 October 2028....................    100 0 0 0 0 22 0 0 0 0 56 15 1 0 0 October 2029....................    100 0 0 0 0 14 0 0 0 0 52 13 1 0 0 October 2030....................    100 0 0 0 0 5 0 0 0 0 47 11 1 0 0 October 2031....................    100 0 0 0 0 0 0 0 0 0 42 9 0 0 0 October 2032.................... 45 0 0 0 0 0 0 0 0 0 36 7 0 0 0 October 2033.................... 0 0 0 0 0 0 0 0 0 0 30 6 0 0 0 October 2034.................... 0 0 0 0 0 0 0 0 0 0 23 4 0 0 0 October 2035.................... 0 0 0 0 0 0 0 0 0 0 16 2 0 0 0 October 2036.................... 0 0 0 0 0 0 0 0 0 0 8 1 0 0 0 October 2037.................... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (years)  ..................   24.9 11.1 3.5 3.5 2.3 15.3 6.0 6.0 6.0 4.1 20.5 11.4 5.7 5.0 3.2 S-23