Year 0-14 1990 3900 1991 4800 1992 5800 1993 6900 1994 7900 1995 8900 1996 9800 1997 11000 1998 12000 1999 12000 2000 13000 2001 14000 2002 14000 2003 15000 2004 15000 2005 16000 2006 16000 2007 16000 2008 16000 2009 15000 2010 15000 2011 15000 2012 14000 2013 14000 2014 14000 2015 14000 2016 13000 2017 13000 2018 13000 2019 13000 2020 13000 2021 12000 2022 12000