Year annual % 1990 7.97569881663355 1991 134.771573614653 1992 830.112923037667 1993 754.427956132085 1994 180.874929917678 1995 42.0310892328294 1996 35.3429079067887 1997 19.3095484121193 1998 9.07750628375146 1999 37.574440469953 2000 27.1617380473374 2001 7.33297415426459 2002 2.02529559228444 2003 3.97456242996095 2004 5.10869478075887 2005 7.12862226955437 2006 9.39161779468316 2007 14.8765522207783 2008 22.2159884113739 2009 4.03530386157287 2010 10.0339035419669 2011 22.4818422448936 2012 8.65631680881187 2013 3.17518813604272 2014 8.41522543621389 2015 3.42728750288953 2016 6.05056427055605 2017 6.32714586262388 2018 3.44744511589256 2019 9.81131194747459 2020 5.34018553508729 2021 15.992797923604 2022 19.6572842421774 2023 13.4157414075184