| 1980 | | 84% | | | | | | | | | | 30 1 | 84% | | 24.4% 16% | | | 58% | | | | | | 60.2% | 47.9% | | 1/3 | 1/3 | | | | | | | | | | | | | | | | | | | | 63% | | 14.8% | | 32. 4% | 44% 19.4% | 2.7% 1.4% | | | |