Year Number 1996 380.02 1997 417.37 1998 372.05 1999 348.26 2000 363.31 2001 423.13 2002 372.27 2003 319.67 2004 373.04 2005 351.61 2006 316.62 2007 325.42 2008 303.83 2009 341.02 2010 391.01 2011 380.43 2012 327.97 2013 351.35 2014 335.27 2015 294.17 2016 375.62 2017 338.15 2018 347.73 2019 760.01 2020 1375.29