| 3 Months | 1 Year | 3 Years | 5 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2004 - 2005) | (Tx 2004 - 2005) | (Tx 2002 - 2005) | (Tx 2000 - 2005) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 247 | 90.2% | 1.9% | 247 | 80.1% | 2.6% | 479 | 55.9% | 2.9% | 687 | 50.6% | 2.5% |
| Yearly Center Volume | 0-4 | 4 | 75.0% | 21.7% | 4 | 75.0% | 21.7% | 12 | 60.0% | 16.7% | 26 | 47.0% | 12.7% |
| 5-7 | 6 | 83.3% | 15.2% | 6 | 62.5% | 21.3% | 18 | 88.2% | 7.8% | 26 | 53.8% | 11.2% | |
| 8-11 | 12 | 91.7% | 8.0% | 12 | 91.7% | 8.0% | 48 | 59.2% | 9.9% | 68 | 48.1% | 13.9% | |
| 12-19 | 52 | 94.2% | 3.2% | 52 | 90.3% | 4.1% | 76 | 63.5% | 7.4% | 90 | 56.3% | 8.0% | |
| 20+ | 173 | 89.6% | 2.3% | 173 | 77.2% | 3.2% | 325 | 52.2% | 3.4% | 477 | 49.5% | 2.8% | |