| 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 | 294 | 91.2% | 1.7% | 294 | 78.6% | 2.4% | 732 | 56.6% | 2.5% | 1,011 | 43.1% | 2.8% |
| Yearly Center Volume | 0-1 | 7 | 85.7% | 13.2% | 7 | 42.9% | 18.7% | 51 | 52.0% | 8.9% | 94 | 7.6% | 6.6% |
| 2-7 | 52 | 82.7% | 5.2% | 52 | 69.2% | 6.4% | 111 | 60.5% | 5.6% | 237 | 44.5% | 7.7% | |
| 8+ | 235 | 93.2% | 1.6% | 235 | 81.7% | 2.5% | 570 | 57.7% | 2.7% | 680 | 47.9% | 2.7% | |