Year Number 1996 65 1998 65.1741256713867 2000 65.6716384887695 2002 63.1840782165527 2003 63.1840782165527 2004 62.5 2005 63.9423065185547 2006 70.6730804443359 2007 68.75 2008 70.6730804443359 2009 63.0331764221191 2010 64.4549789428711 2011 59.6244125366211 2012 60.5633811950684 2013 60.0938949584961 2014 61.5763549804688 2015 45.8128089904785 2016 43.8423652648926 2017 47.290641784668 2018 50 2019 47.3429946899414 2020 50.2415466308594 2021 50.2415466308594 2022 50.7246360778809