56 E March 57 G April 58 J May 59 L June 60 N July 61 P August 62 R Sept. 63 T Oct. 64 V Nov. 65 X Dec. 66 B January 67 D February 68 F March 69 H April 70 K May 71 M June 72 Q July 73 S August 74 U Sept. 75 W Oct. 76 Y Nov. 77 Z Dec. 78 A January 79 C February 1980 E March 1981 G April 1982 J May 1983 L June 1984 N July 1985 P August 1986 R Sept. 1987 T Oct. 1988 V Nov. 1989 X Dec. 1990 B January 1991 D February 1992 F March 1993 H April 1994 K May 1995 M June 1996 Q July 1997 S August 1998 U Sept. 1999 W Oct. 2000 Y Nov. 2001 Z Dec. 2002 A January 2003 C February 2004 E March 2005 G April 2006 J May 2007 L June