| YEARS | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC |
| 1955 | – | – | – | – | – | – | – | – | – | – | – | Dec |
| 1956 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1957 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1958 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep-Oct | – | Nov | Dec |
| 1959 | Jan | – | Mar | – | May-Jun | – | Jul | Aug-Sep | – | Oct-Nov_Dec | – | – |
| 1960 | Jan | Feb | Mar | Apr | May | Jun–Jul | – | Aug | Sep | Oct | Nov | Dec |
| 1961 | – | – | – | – | – | – | – | – | – | – | – | – |
| 1962 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1963 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1964 | – | – | – | – | – | – | – | – | – | – | – | – |
| 1965 | Jan | Feb | Mar | Apr | May-Jun | – | Jul | Aug-Sep | – | Oct | Nov | Dec |
| 1966 | – | Feb | Mar | Apr | – | Jun | Jul | Aug | Sep | Oct | Nov | – |
| 1967 | – | Feb | Mar | Apr-May | – | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1968 | – | – | – | – | – | – | – | – | – | – | – | – |
| 1969 | Jan | Feb | Mar | Apr-May | – | Jun | Jul | Aug-Sep | – | Oct | Nov-Dec | – |
| 1970 | Jan | Feb | Mar | Apr | May | Jun-Jul | – | Aug | Sep-Oct | – | Nov | Dec |
| 1971 | Jan | Feb-Mar | – | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1972 | Jan | Feb | Mar-Apr | – | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1973 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1974 | Jan | Feb | Mar | Apr | May | – | Jul-Aug | – | Sep | Oct-Nov | – | Dec |
| 1975 | Jan | Feb | Mar | Apr | May-Jun | – | Jul | Aug-Sep | – | Oct | – | – |
| 1976 | Jan | Feb | Mar | Apr | – | Jun | Jul-Aug | – | Sep | Oct | Nov-Dec | – |
| 1977 | Jan | Feb | Mar | Apr | May-Jun | – | Jul | Aug-Sep | – | Oct | Nov-Dec | – |
| 1978 | Jan | Feb | Mar | Apr | May-Jun | – | Jul | Aug-Sep | – | Oct | Nov-Dec | – |
| 1979 | Jan | Feb | Mar | Apr-May | – | Jun | Jul | Aug-Sep | – | Oct | Nov-Dec | – |
| 1980 | Jan | Feb | Mar | Apr-May | – | Jun | Jul | Aug-Sep | – | Oct | Nov | Dec |
| 1981 | Jan | Feb-Mar | – | Apr | May | Jun | Jul-Aug | – | Sep | Oct | Nov-Dec | – |
| 1982 | Jan | Feb | Mar | Apr-May | Jun | Jul | Aug-Sep | – | Oct | Nov | Dec |
| 1983 | Jan | Feb | Mar | Apr | May | Jun-Jul | – | Aug | Sep | Oct | Nov | Dec |
| 1984 | Jan-Feb | – | Mar | Apr | May | Jun | – | Aug | Sep | Oct | Nov | Dec |
| 1985 | Jan | Feb-Mar | – | Apr-May | – | jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1986 | Jan-Feb | – | Mar | Apr-May | – | Jun | Jul | Aug | Sep-Oct | – | Nov | Dec |
| 1987 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep-Oct | – | Nov | Dec |
| 1988 | – | – | – | – | – | – | – | – | – | – | – | – |
| 1989 | Jan-Feb | – | Mar | Apr | May | Jun-Jul | – | Aug | Sep | Oct | Nov-Dec | – |
| 1990 | – | – | – | – | – | – | – | – | – | – | – | – |
| 1991 | – | – | – | – | – | – | – | – | – | – | – | – |
| 1992 | Jan | – | Mar | – | May | Jun | Jul | – | Sep | Oct | Nov | – |
| 1993 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1994 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1995 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1996 | Jan | Feb | Mar | Apr | – | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1997 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1998 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1999 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2000 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2001 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2002 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2003 | Jan | Feb | Mar | Apr | May | Jun-Jul | – | Aug | Sep | Oct | Nov | Dec |
| 2004 | Jan | Feb | Mar-Apr | – | May | Jun | Jul | Aug-Sep | – | Oct | Nov | Dec |
| 2005 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2006 | – | – | – | – | – | Jun | Jul | – | Sep | Oct | Nov | Dec |
| 2007 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2008 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2009 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2010 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2011 | Jan | Feb | Mar | Apr | May | Jun | July | Aug | Sep | Oct | Nov | Dec |