| 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 | 221 | 87.8% | 2.2% | 221 | 81.2% | 2.6% | 682 | 51.3% | 2.4% | 1,047 | 26.3% | 4.2% |
| Yearly Center Volume | 0-4 | 7 | 85.7% | 13.2% | 7 | 85.7% | 13.2% | 20 | 65.5% | 13.6% | 59 | 28.6% | 11.1% |
| 5-7 | 8 | 50.0% | 17.7% | 8 | 50.0% | 17.7% | 29 | 54.8% | 11.2% | 74 | 28.5% | 9.1% | |
| 8-11 | 26 | 88.5% | 6.3% | 26 | 88.5% | 6.3% | 72 | 50.4% | 9.8% | 73 | + | + | |
| 12-19 | 24 | 79.2% | 8.3% | 24 | 79.2% | 8.3% | 102 | 61.0% | 6.9% | 111 | 35.9% | 10.0% | |
| 20+ | 156 | 91.0% | 2.3% | 156 | 81.9% | 3.1% | 459 | 48.3% | 2.8% | 730 | 23.5% | 5.3% | |