| Cumulative | Cumulative | ||
| Number | Number | Percent | |
| After 1 Year (Summer 2003) | 8 | 8 | 3.9% |
| After 2 Years (Summer 2004) | 18 | 26 | 12.6% |
| After 3 Years (Summer 2005) | 10 | 36 | 17.5% |
| After 4 Years (Summer 2006) | 3 | 39 | 18.9% |
| After 5 Years (Summer 2007) | 12 | 51 | 24.8% |
| After 6 Years (Summer 2008) | 5 | 56 | 27.2% |
| After 7 Years (Summer 2009) | 5 | 61 | 29.6% |
| More than 7 Years (after Summer 2009) | 3 | 64 | 31.1% |
| Total | 64 | ||
| NOTE: Data is through Summer 2011 |
