| 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 | 634 | 85.5% | 1.4% | 634 | 77.2% | 1.7% | 2,073 | 53.6% | 1.5% | 2,989 | 34.6% | 2.0% |
| Yearly Center Volume | 0-4 | 76 | 80.3% | 4.6% | 76 | 73.7% | 5.1% | 257 | 46.9% | 4.9% | 437 | 26.9% | 7.0% |
| 5-7 | 65 | 80.0% | 5.0% | 65 | 65.9% | 5.9% | 260 | 55.2% | 3.9% | 299 | 35.5% | 6.7% | |
| 8-11 | 65 | 89.2% | 3.9% | 65 | 84.4% | 4.5% | 288 | 48.5% | 4.6% | 444 | + | + | |
| 12-19 | 116 | 83.6% | 3.4% | 116 | 74.6% | 4.1% | 411 | 56.4% | 3.5% | 538 | 35.0% | 5.9% | |
| 20+ | 312 | 87.8% | 1.9% | 312 | 79.8% | 2.3% | 857 | 54.8% | 2.2% | 1,271 | 37.1% | 2.4% | |