| 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 | 322 | 85.4% | 2.0% | 322 | 71.4% | 2.5% | 791 | 46.7% | 2.5% | 1,102 | 32.4% | 2.7% |
| Yearly Center Volume | 0-1 | 8 | 75.0% | 15.3% | 8 | 37.5% | 17.1% | 54 | 42.7% | 8.5% | 101 | 6.6% | 5.7% |
| 2-7 | 54 | 75.9% | 5.8% | 54 | 61.0% | 6.7% | 116 | 54.3% | 5.6% | 253 | 41.0% | 6.4% | |
| 8+ | 260 | 87.7% | 2.0% | 260 | 74.6% | 2.7% | 621 | 47.4% | 2.7% | 748 | 35.3% | 2.7% | |