| Cumulative | Cumulative | ||
| Number | Number | Percent | |
| After 1 Year (Summer 2002) | 8 | 8 | 4.4% |
| After 2 Years (Summer 2003) | 36 | 44 | 24.2% |
| After 3 Years (Summer 2004) | 5 | 49 | 26.9% |
| After 4 Years (Summer 2005) | 7 | 56 | 30.8% |
| After 5 Years (Summer 2006) | 13 | 69 | 37.9% |
| After 6 Years (Summer 2007) | 6 | 75 | 41.2% |
| After 7 Years (Summer 2008) | 2 | 77 | 42.3% |
| More than 7 Years (after Summer 2008) | 7 | 84 | 46.2% |
| Total | 84 | ||
| NOTE: Data is through Summer 2011 |
