Year % 1989 8.29134836509294 1990 5.452176099526036 1991 6.585797061879798 1992 11.647044812279741 1993 10.340071283103576 1994 8.152557559616064 1995 7.920644403621709 1996 7.9522525442028105 1997 7.743308890971416 1998 6.094069226911199 1999 4.736635743815987 2000 5.138245885904864 2001 4.1289038753951335 2002 3.158738553550886 2003 2.6006777316027794 2004 2.762226465295315 2005 3.2382698096557663 2006 3.4241667116035637 2007 3.7624346754647613 2008 4.332593826376264 2009 3.0270090987760616 2010 3.5796857929565413 2011 2.944663725535147 2012 3.619198646830145 2013 3.951211997463773 2014 3.917647828218787 2015 3.1678662337112153 2016 2.3353258767356113 2017 2.2580886386256394 2018 1.5948330304383653 2019 1.6489171402190819 2020 0.7375152460162036 2021 0.7580066704548463 2022 -1.2934999243697929 2023 -0.3616619920636605