Year % gross 1978 0.644810020923615 1979 1.10099005699158 1980 1.40257000923157 1983 1.19446003437042 1999 3.46760988235474 2005 5.73763990402222 2006 6.1736798286438 2007 6.85041999816895 2008 8.03118991851807 2009 7.54038000106812 2010 7.85099983215332 2011 8.69600009918213 2012 8.51399993896484 2013 11.2389297485352 2017 14.7589998245239 2018 14.7399997711182 2019 15.7110004425049 2020 16.378999710083 2021 16.2630004882812 2022 17.261999130249