| B W(g) Year |
< 500 |
500 – 1000 |
| 1980 |
0/0 |
493/1102 (45%) |
| 1985 |
5/52 (10%) |
1085/1846 (59%) |
| 1990 |
9/50 (18%) |
1462/2000 (73%) |
| 1995 |
39/132 (30%) |
1789/2287 (78%) |
| 2000 |
57/153 (37%) |
2238/2638 (85%) |
| 005 |
94/211 (44%) |
2369/2854 (83%) |
[no. of survival/no. of admission (survival rate, %)] |
