Year Age 1990 350 1991 350 1992 600 1993 600 1994 600 1995 600 1996 600 1997 600 1998 600 1999 600 2000 600 2001 600 2002 600 2003 600 2004 600 2005 600 2006 350 2007 350 2008 350 2009 350 2010 350 2011 350