| 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 | 2,671 | 92.0% | 0.5% | 2,671 | 83.6% | 0.7% | 6,832 | 53.4% | 0.8% | 11,052 | 28.5% | 0.8% |
| Yearly Center Volume | 0-3 | 15 | 80.0% | 10.3% | 15 | 66.7% | 12.2% | 188 | 47.6% | 4.7% | 402 | 24.0% | 2.8% |
| 4-6 | 84 | 84.5% | 3.9% | 84 | 78.6% | 4.5% | 93 | 26.8% | 6.7% | 640 | 27.6% | 2.9% | |
| 7-11 | 104 | 87.5% | 3.2% | 104 | 76.0% | 4.2% | 605 | 48.2% | 2.9% | 855 | 22.0% | 2.4% | |
| 12-20 | 438 | 91.1% | 1.4% | 438 | 81.7% | 1.8% | 1,267 | 45.8% | 1.9% | 2,870 | 24.6% | 1.5% | |
| 21+ | 2,030 | 92.8% | 0.6% | 2,030 | 84.7% | 0.8% | 4,679 | 56.8% | 1.0% | 6,285 | 31.5% | 1.1% | |