| 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 | 195 | 99.0% | 0.7% | 195 | 97.9% | 1.0% | 605 | 88.7% | 1.6% | 930 | 73.3% | 2.9% |
| Yearly Center Volume | 0-4 | 7 | 85.7% | 13.2% | 7 | 85.7% | 13.2% | 19 | 100.0% | 0.0% | 55 | 84.2% | 6.8% |
| 5-7 | 8 | 100.0% | 0.0% | 8 | 100.0% | 0.0% | 29 | 96.6% | 3.4% | 72 | 82.1% | 8.4% | |
| 8-11 | 25 | 100.0% | 0.0% | 25 | 100.0% | 0.0% | 67 | 93.6% | 3.1% | 68 | 76.3% | 11.1% | |
| 12-19 | 22 | 100.0% | 0.0% | 22 | 100.0% | 0.0% | 97 | 93.6% | 2.8% | 104 | 77.7% | 6.4% | |
| 20+ | 133 | 99.2% | 0.7% | 133 | 97.7% | 1.3% | 393 | 86.0% | 2.1% | 631 | 70.6% | 3.8% | |