| 3 Months | 1 Year | 3 Years | 5 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2002 - 2003) | (Tx 2002 - 2003) | (Tx 2000 - 2003) | (Tx 1998 - 2003) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 679 | 87.6% | 1.3% | 679 | 81.7% | 1.5% | 1,586 | 73.2% | 1.2% | 1,928 | 69.7% | 1.2% |
| Yearly Center Volume | 0-9 | 19 | 73.7% | 10.1% | 19 | 73.7% | 10.1% | 51 | 71.3% | 6.6% | 82 | 68.0% | 6.2% |
| 10-19 | 47 | 83.0% | 5.5% | 47 | 76.6% | 6.2% | 71 | 79.0% | 5.1% | 72 | 77.4% | 5.0% | |
| 20-34 | 35 | 82.9% | 6.4% | 35 | 74.3% | 7.4% | 122 | 68.2% | 4.4% | 234 | 66.8% | 3.3% | |
| 35-56 | 163 | 85.3% | 2.8% | 163 | 77.9% | 3.2% | 367 | 69.7% | 2.6% | 524 | 69.7% | 2.5% | |
| 57+ | 415 | 90.1% | 1.5% | 415 | 84.8% | 1.8% | 975 | 74.9% | 1.5% | 1,016 | 70.0% | 1.7% | |