which years was the marathon completed in?
1983, 1984, 1985, 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997 (jan), 1997 (dec), 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
what is the shortest time the marathon was completed since 1990?
?