| 3 Months | 1 Year | 5 Years | 10 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2005 - 2006) | (Tx 2005 - 2006) | (Tx 2001 - 2006) | (Tx 1996 - 2006) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 2,799 | 91.3% | 0.5% | 2,799 | 82.2% | 0.7% | 7,079 | 50.5% | 0.9% | 11,415 | 25.8% | 0.8% |
| Yearly Center Volume | 0-3 | 15 | 80.0% | 10.3% | 15 | 66.7% | 12.2% | 197 | 41.2% | 4.8% | 410 | 20.8% | 3.0% |
| 4-6 | 94 | 85.1% | 3.7% | 94 | 78.7% | 4.2% | 93 | 22.5% | 6.7% | 673 | 24.8% | 2.9% | |
| 7-11 | 110 | 87.3% | 3.2% | 110 | 76.2% | 4.1% | 627 | 45.0% | 2.9% | 883 | 20.0% | 2.4% | |
| 12-20 | 454 | 90.1% | 1.4% | 454 | 79.9% | 1.9% | 1,326 | 43.7% | 1.9% | 2,957 | 22.2% | 1.5% | |
| 21+ | 2,126 | 92.1% | 0.6% | 2,126 | 83.3% | 0.8% | 4,836 | 53.9% | 1.0% | 6,492 | 28.6% | 1.1% | |