| 3 Months | 1 Year | 5 Years | 10 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2006 - 2007) | (Tx 2006 - 2007) | (Tx 2002 - 2007) | (Tx 1997 - 2007) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 14,409 | 98.4% | 0.1% | 14,409 | 96.3% | 0.2% | 39,452 | 84.2% | 0.3% | 68,081 | 64.1% | 0.3% |
| Yearly Center Volume | 0-12 | 276 | 99.6% | 0.4% | 276 | 98.6% | 0.7% | 776 | 89.3% | 1.5% | 1,863 | 67.9% | 1.8% |
| 13-28 | 899 | 98.1% | 0.5% | 899 | 96.3% | 0.6% | 2,721 | 82.8% | 1.1% | 5,301 | 66.0% | 1.1% | |
| 29-47 | 1,569 | 97.8% | 0.4% | 1,569 | 95.4% | 0.5% | 4,531 | 82.4% | 0.8% | 9,525 | 64.1% | 0.8% | |
| 48-81 | 2,539 | 98.8% | 0.2% | 2,539 | 96.6% | 0.4% | 8,643 | 83.9% | 0.5% | 14,840 | 62.2% | 0.7% | |
| 82+ | 9,126 | 98.4% | 0.1% | 9,126 | 96.3% | 0.2% | 22,781 | 84.7% | 0.3% | 36,552 | 64.3% | 0.4% | |