|
| 个数 | 年份 |
| AOI >= 0.5 & DAI >= 0.5 | 4 | 1948, 1973, 1975, 2015 |
| AOI<=−0.5 & DAI <= −0.5 | 4 | 1952, 1969, 1980, 2009 |
| AOI~0 & DAI >= 0.5 | 12 | 1955, 1961, 1962, 1963, 1971, 1978, 1982, 1983, 1997, 2002, 2007, 2008 |
| AOI~0 & DAI <= −0.5 | 7 | 1972, 1974, 1984, 1986, 1996, 2006, 2012 |
| AOI >= 0.5 & DAI ~0 | 8 | 1959, 1967, 1988, 1989, 1990, 1992, 2003, 2011 |
| AOI <= −0.5 & DAI~0 | 13 | 1960, 1965, 1966, 1970, 1977, 1979, 1981, 1985, 1987, 1998, 1999, 2005, 2010 |
| AOI >= 0.5 & DAI <= −0.5 | 7 | 1953, 1954, 1956, 1964, 1976, 1991, 1994 |
| AOI <= −0.5 & DAI >= 0.5 | 6 | 1951, 1957, 1958, 1968, 1995, 2004 |
| AOI~0 & DAI~0 | 7 | 1949, 1950, 1993, 2000, 2001, 2013, 2014 |