Year Number 1995 23000 1996 24000 1997 26000 1998 27000 1999 24000 2000 24000 2001 19399.9996185303 2002 18899.9996185303 2003 20600.0003814697 2004 23299.9992370605 2005 25899.9996185303 2006 28500 2007 15199.999809265099 2008 14800.000190734901 2009 11300.000190734901 2010 15300.000190734901 2011 18799.9992370605 2012 22799.9992370605 2013 21899.9996185303 2014 22799.9992370605 2015 23600.0003814697 2016 26799.9992370605 2017 28000 2018 35900.0015258789 2019 45099.9984741211 2020 7000