| Year |
1950 |
1960 |
1970 |
1980 |
1990 |
2000 |
2009 |
| Perinatal mortality rate (y) |
46.6 |
41.4 |
21.7 |
11.7 |
5.7 |
3.8 |
2.9 |
| % Hospital births (x) |
4.6 |
50.1 |
96.1 |
99.5 |
99.9 |
99.8 |
99.8 |
Regression analysis of the data yields the equation y =–0.45x+54.09 (R2=0.83, two-tailed P=0.004), where x is % hospital births and y is perinatal mortality rate |
