Year % 1988 628.3196662680891 1989 -88.42983652656922 1990 -97.69347711550601 1991 -97.52007696994103 1992 -6.352399137583694 1993 -3.189620719789062 1994 -50.15877011452604 1995 2.5440357056255416 1996 6.702558497930225 1997 6.761060221850876 1998 3.2196926951893388 1999 7.64279225174915 2000 8.821366263015312 2001 10.547728097577972 2002 14.573407191672155 2003 9.70097533554037 2004 4.07198285540005 2005 2.0336082629062684 2006 3.43742788367198 2007 3.0696214697551505 2008 -2.607506513423804 2009 7.55396189547601 2010 6.766250245603313 2011 0.2935686311616539 2012 5.41310978715737 2013 10.191090538149728 2014 4.746922008036564 2015 4.1494993269796465 2016 6.547363732120235 2017 6.3933930579831895 2018 8.023970234708056 2019 6.700843576098695 2020 5.487759353385574 2021 5.86824676542605 2022 0.4143285106350559 2023 -1.0719962303586088