Registry | n1 | mean2 | SD3 | minimum4 | maximum5 |
---|---|---|---|---|---|
1990–1999 | 31,976 | 1.06 | 0.26 | 1 | 4 |
1990 | 2,780 | 1.02 | 0.13 | 1 | 2 |
1991 | 3,054 | 1.03 | 0.16 | 1 | 3 |
1992 | 3,179 | 1.02 | 0.14 | 1 | 3 |
1993 | 3,493 | 1.02 | 0.14 | 1 | 3 |
1994 | 3,210 | 1.02 | 0.14 | 1 | 2 |
1995 | 3,231 | 1.02 | 0.14 | 1 | 3 |
1996 | 3,423 | 1.03 | 0.17 | 1 | 3 |
1997 | 3,616 | 1.02 | 0.14 | 1 | 2 |
1998 | 3,538 | 1.03 | 0.16 | 1 | 3 |
1999 | 3,781 | 1.02 | 0.16 | 1 | 3 |
Hospital | n 1 | mean 2 | SD 3 | minimum 4 | maximum 5 |
1990–1999 | 31,203 | 1.93 | 1.55 | 1 | 34 |
1990 | 4,031 | 1.55 | 1.10 | 1 | 22 |
1991 | 4,150 | 1.54 | 1.00 | 1 | 15 |
1992 | 4,252 | 1.51 | 0.93 | 1 | 12 |
1993 | 4,332 | 1.51 | 0.90 | 1 | 11 |
1994 | 4,010 | 1.47 | 0.87 | 1 | 13 |
1995 | 3,939 | 1.47 | 0.88 | 1 | 16 |
1996 | 3,947 | 1.45 | 0.91 | 1 | 15 |
1997 | 4,206 | 1.42 | 0.77 | 1 | 11 |
1998 | 4,067 | 1.39 | 0.77 | 1 | 15 |
1999 | 4,102 | 1.37 | 0.72 | 1 | 15 |