| Blood Type | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Total | 1,482 | 1,818 | 2,107 | 2,041 | 2,062 | 1,907 | 1,700 | 1,529 | 1,444 | 1,350 |
| A | 465 | 593 | 672 | 584 | 575 | 581 | 530 | 454 | 439 | 408 |
| AB | 37 | 41 | 46 | 39 | 48 | 37 | 33 | 39 | 33 | 22 |
| B | 214 | 251 | 274 | 303 | 300 | 263 | 232 | 192 | 192 | 186 |
| O | 766 | 933 | 1,115 | 1,115 | 1,139 | 1,026 | 905 | 844 | 780 | 734 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| A | 31.4% | 32.6% | 31.9% | 28.6% | 27.9% | 30.5% | 31.2% | 29.7% | 30.4% | 30.2% |
| AB | 2.5% | 2.3% | 2.2% | 1.9% | 2.3% | 1.9% | 1.9% | 2.6% | 2.3% | 1.6% |
| B | 14.4% | 13.8% | 13.0% | 14.8% | 14.5% | 13.8% | 13.6% | 12.6% | 13.3% | 13.8% |
| O | 51.7% | 51.3% | 52.9% | 54.6% | 55.2% | 53.8% | 53.2% | 55.2% | 54.0% | 54.4% |