| 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 | 490 | 99.0% | 0.5% | 490 | 97.3% | 0.7% | 1,613 | 83.9% | 1.2% | 2,249 | 65.4% | 2.3% |
| Yearly Center Volume | 0-4 | 66 | 100.0% | 0.0% | 66 | 97.0% | 2.1% | 218 | 82.3% | 3.6% | 370 | 71.0% | 5.5% |
| 5-7 | 54 | 100.0% | 0.0% | 54 | 98.1% | 1.8% | 214 | 86.0% | 3.4% | 237 | 73.2% | 5.1% | |
| 8-11 | 59 | 98.3% | 1.7% | 59 | 96.6% | 2.4% | 236 | 83.5% | 3.4% | 362 | 57.6% | 10.7% | |
| 12-19 | 93 | 95.7% | 2.1% | 93 | 94.6% | 2.3% | 317 | 85.3% | 2.7% | 405 | 77.1% | 3.2% | |
| 20+ | 218 | 100.0% | 0.0% | 218 | 98.6% | 0.8% | 628 | 83.4% | 1.9% | 875 | 62.1% | 3.2% | |