| 3 Months | 1 Year | 5 Years | 10 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2006 - 2007) | (Tx 2006 - 2007) | (Tx 2002 - 2007) | (Tx 1997 - 2007) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 537 | 90.9% | 1.2% | 537 | 86.0% | 1.5% | 1,854 | 72.9% | 1.2% | 3,201 | 62.6% | 1.2% |
| Yearly Center Volume | 0-9 | 12 | 91.7% | 8.0% | 12 | 75.0% | 12.5% | 46 | 60.1% | 7.8% | 133 | 66.0% | 4.7% |
| 10-19 | 17 | 82.4% | 9.2% | 17 | 82.4% | 9.2% | 128 | 73.7% | 4.9% | 119 | 72.9% | 5.3% | |
| 20-34 | 33 | 100.0% | 0.0% | 33 | 93.9% | 4.2% | 84 | 59.7% | 7.0% | 288 | 61.0% | 3.2% | |
| 35-56 | 145 | 89.0% | 2.6% | 145 | 86.2% | 2.9% | 424 | 77.9% | 2.3% | 925 | 64.3% | 2.4% | |
| 57+ | 330 | 91.2% | 1.6% | 330 | 85.8% | 1.9% | 1,172 | 72.5% | 1.5% | 1,736 | 60.6% | 1.9% | |