| 3 Months | 1 Year | 3 Years | 5 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2003 - 2004) | (Tx 2003 - 2004) | (Tx 2001 - 2004) | (Tx 1999 - 2004) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 639 | 90.0% | 1.2% | 639 | 84.0% | 1.4% | 1,515 | 76.0% | 1.2% | 2,163 | 68.8% | 1.2% |
| Yearly Center Volume | 0-9 | 14 | 85.7% | 9.4% | 14 | 85.7% | 9.4% | 48 | 70.4% | 6.7% | 74 | 57.7% | 7.5% |
| 10-19 | 40 | 82.5% | 6.0% | 40 | 80.0% | 6.3% | 71 | 79.9% | 4.8% | 104 | 79.1% | 4.1% | |
| 20-34 | 42 | 88.1% | 5.0% | 42 | 81.0% | 6.1% | 133 | 71.0% | 4.1% | 208 | 68.4% | 3.5% | |
| 35-56 | 132 | 92.4% | 2.3% | 132 | 84.1% | 3.2% | 318 | 76.8% | 2.5% | 453 | 67.7% | 2.6% | |
| 57+ | 411 | 90.3% | 1.5% | 411 | 84.7% | 1.8% | 945 | 76.5% | 1.5% | 1,324 | 69.0% | 1.6% | |