| Description | Years | Total number of years |
| Warm ENSO phase | 1963, 1965, 1972, 1976, 1982, 1983, 1987, 1991, 1997 and 2002 | 10 years |
| Cold ENSO phase | 1961, 1964, 1967, 1970, 1971, 1973, 1975, 1978, 1984, 1985, 1988 and 1999 | 12 years |
| Neutral ENSO phase | 1960, 1962, 1966, 1968, 1969, 1974, 1977, 1979, 1980, 1981, 1986, 1989, 1990, 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2001, 2003, 2004 and 2005 | 24 years |
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