| 序号 | 时间 (年) |
数据 (‰) |
|---|---|---|
| 1 | 2024 | |
| 2 | 2023 | |
| 3 | 2022 | |
| 4 | 2021 | |
| 5 | 2020 | |
| 6 | 2019 | |
| 7 | 2018 | 272.06 |
| 8 | 2017 | 270.45 |
| 9 | 2016 | 284.43 |
| 10 | 2015 | 299.51 |
| 11 | 2014 | 303.04 |
| 12 | 2013 | 303.29 |
| 13 | 2012 | 303.64 |
| 14 | 2011 | 303.72 |
| 15 | 2010 | 300.01 |
| 16 | 2009 | 294.04 |
| 17 | 2008 | 294.53 |
| 18 | 2007 | 301.03 |
| 19 | 2006 | 309.39 |
| 20 | 2005 | 308.82 |
| 21 | 2004 | 309.15 |
| 22 | 2003 | 311.34 |
| 23 | 2002 | 316.45 |
| 24 | 2001 | 317.88 |
| 25 | 2000 | 319.77 |
| 26 | 1999 | 330.34 |
| 27 | 1998 | 327.55 |
| 28 | 1997 | 332.42 |
| 29 | 1996 | 355.03 |
| 30 | 1995 | 340.80 |
| 31 | 1994 | 338.17 |
| 32 | 1993 | 312.18 |
| 33 | 1992 | 316.05 |
| 34 | 1991 | 298.74 |
| 35 | 1990 | 282.10 |
| 36 | 1989 | 270.20 |
| 37 | 1988 | 275.61 |
| 38 | 1987 | 272.10 |
| 39 | 1986 | 279.72 |
| 40 | 1985 | 314.50 |
| 41 | 1984 | 312.54 |
| 42 | 1983 | 311.34 |
| 43 | 1982 | 295.28 |
| 44 | 1981 | 305.15 |
| 45 | 1980 | 312.76 |
| 46 | 1979 | 318.45 |
| 47 | 1978 | 322.65 |
| 48 | 1977 | 321.13 |
| 49 | 1976 | 319.26 |
| 50 | 1975 | 322.35 |
| 51 | 1974 | 320.43 |
| 52 | 1973 | 319.01 |
| 53 | 1972 | 323.76 |
| 54 | 1971 | 322.21 |
| 55 | 1970 | 319.72 |
| 56 | 1969 | 319.13 |
| 57 | 1968 | 321.61 |
| 58 | 1967 | 320.12 |
| 59 | 1966 | 323.09 |
| 60 | 1965 | 322.68 |
| 61 | 1964 | 327.34 |
| 62 | 1963 | 332.27 |
| 63 | 1962 | 338.36 |
| 64 | 1961 | 343.13 |
| 65 | 1960 | 344.08 |
