Year annual % 1961 4.293503649030001 1962 3.7500606480457463 1963 2.7749834151698565 1964 -0.48536284137142616 1965 -1.7871917862589441 1966 1.9213490609462696 1967 4.864406166789649 1968 6.945376864609017 1969 1.4158336466819037 1970 3.036120487311365 1971 2.141618928623231 1972 9.885673412113931 1973 6.269434670430357 1974 37.472154366290624 1975 14.658148073586716 1976 -5.7765537102170725 1977 1.6795652102649399 1978 14.787785742790334 1979 6.562940068783433 1980 11.77879324654809 1981 4.3407395466404495 1982 4.302404551148371 1983 8.91968461045738 1984 19.28175219569532 1985 14.51009889810176 1986 12.293362690549287 1987 58.71082111637341 1988 23.646037717068637 1989 162.54600971486178 1990 56.444609564666905 1991 134.53764412728023 1992 11.30074367281236 1993 16.950888801422195 1994 16.572397275826177 1995 12.35170874909845 1996 3.930579753464599 1997 1.4432537062100153 1998 2.970092815272068 1999 11.210506950425156 2000 6.5860437256788344 2001 0.3219715640835119 2002 2.618751572400413 2003 4.718566729448568 2004 6.775237838914123 2005 7.632428919345884 2006 174.85770474256776 2007 8.211010385473273 2008 9.554748586189916 2009 1.1531139569827928 2010 3.9722524192748807 2011 2.4093198298071883 2012 4.727615066650557 2013 -0.5366805281057196 2014 -2.105403886670331 2015 3.0043095168452254 2016 0.8981759265169984 2017 2.1090078739521374 2018 -2.8874879253939127 2019 2.9611884630726735 2020 -26.29609907454234 2021 22.471218831686258 2022 11.988299317673665 2023 -14.259105956532025