| | 1956 | 49.9‰ 20 | 6.5‰ 20 | 20 | 36.24‰ 20 23.9‰ | 1990 | 86.07‰ | 2.34‰ 15 19 20 | 24 3 | | | | | | | | | 1985 | 29.5% | 2.3% 35 | 69.3 |