Year 2015 = 100 1990 44.7254335246 1991 47.2061657019 1992 24.3256261974 1993 24.5664739853 1994 24.5664739853 1995 23.0973025033 1996 21.8930635811 1997 26.44508671 1998 15.6791907501 1999 15.3420038523 2000 17.0520231204 2001 19.8940269795 2002 24.2774566535 2003 25.6743738026 2004 30.7803468231 2005 32.2254335161 2006 35.284200391 2007 40.5828516384 2008 49.6146435463 2009 48.0491329423 2010 61.5366088571 2011 89.2341040333 2012 95.2552986442 2013 92.3651252412 2014 105.1300577925 2015 100 2016 72.3988439288 2017 42.630057801 2018 6.0452793829 2019 6.7437379574 2020 2.1676300582 2021 3.1551059731