| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2020 | |
| 2 | 2019 | |
| 3 | 2018 | |
| 4 | 2017 | |
| 5 | 2016 | |
| 6 | 2015 | |
| 7 | 2014 | 34.21 |
| 8 | 2013 | 32.68 |
| 9 | 2012 | 32.91 |
| 10 | 2011 | 36.62 |
| 11 | 2010 | 35.35 |
| 12 | 2009 | 33.06 |
| 13 | 2008 | 29.51 |
| 14 | 2007 | 23.83 |
| 15 | 2006 | 23.34 |
| 16 | 1981 | 31.61 |
| 17 | 1980 | 28.86 |
| 18 | 1979 | 24.54 |
| 19 | 1978 | 22.53 |
| 20 | 1977 | 21.65 |
| 21 | 1976 | 19.55 |
| 22 | 1975 | 16.99 |
| 23 | 1974 | 16.59 |
| 24 | 1973 | 18.18 |
| 25 | 1972 | 18.35 |
| 26 | 1971 | 14.04 |
| 27 | 1970 | 13.20 |
| 28 | 1969 | 15.29 |
| 29 | 1968 | 13.29 |
| 30 | 1967 | 9.34 |
| 31 | 1966 | 11.21 |
| 32 | 1965 | 15.57 |
| 33 | 1964 | 16.69 |
| 34 | 1963 | 14.46 |
| 35 | 1962 | 17.20 |
| 36 | 1961 | 14.53 |
| 37 | 1960 | 13.45 |