B – Jan | L – Feb | A – Mar | C – Apr | K – May | P – Jun |
O – Jul | W – Aug | D – Sep | E – Oct | R – Nov | X – Dec |
M – 1921 | N – 1922 | P – 1923 | R – 1924 | S – 1925 |
T – 1926 | U – 1927 | W – 1928 | X – 1929 | Y – 1930 |
Z – 1931 | A – 1932 | B – 1933 | C – 1934 | D – 1935 |
E – 1936 | F – 1937 | G – 1938 | H – 1939 | J – 1940 |
K – 1941 | L – 1942 | MM – 1943 | NN – 1944 | PP – 1945 |
RR – 1946 | SS – 1947 | TT – 1948 | UU – 1949 | WW – 1950 |
XX – 1951 | YY – 1952 | ZZ – 1953 | A – 1954 | B – 1955 |
C – 1956 | D – 1957 | E – 1958 | F – 1959 | G – 1960 |
H – 1961 | J – 1962 | K – 1963 | L – 1964 | M – 1965 |
N – 1966 | P – 1967 | R – 1968 | S – 1969 | T – 1970 |
U – 1971 | W – 1972 | X – 1973 | Y – 1974 | Z – 1975 |
I – 1976 | O – 1977 | Q – 1978 | V – 1979 | A – 1980 |
B – 1981 | C – 1982 | D – 1983 | E – 1984 | F – 1985 |
G – 1986 | H – 1987 | I – 1988 | J – 1989 | K – 1990 |
L – 1991 | M – 1992 | N – 1993 | O – 1994 | P – 1995 |
Q – 1996 | R – 1997 | S – 1998 | T – 1999 (*) | U – 2000 (*) |
V – 2001 (*) | W – 2002 | X – 2003 | Y – 2004 | Z – 2005 |
A – 2006 | B – 2007 | C – 2008 | D – 2009 | E – 2010 |
F – 2011 | G – 2012 |