Year annual % 1971 4.7282251113350355 1972 5.50539632112455 1973 7.810187402297359 1974 2.4814836899637527 1975 0.5646965712636955 1976 4.8964894932952205 1977 2.5046124525695177 1978 2.400742455130583 1979 5.036986996860065 1980 -0.9220505669828754 1981 0.42058390516692157 1982 2.4663541463797003 1983 -0.1422642918664394 1984 0.37053166051011033 1985 2.6778546064840896 1986 2.6822915274792507 1987 1.6486325164915456 1988 2.9900766896967355 1989 2.933147346364052 1990 2.867283353937353 1991 2.6381906399577986 1992 1.4955429578617014 1993 -0.8364697951602267 1994 2.079845341080542 1995 1.3635300683578748 1996 1.7643454317191498 1997 1.2876772805232548 1998 2.919080093976632 1999 1.8788621569762398 2000 2.567817930476508 2001 0.5966555184094204 2002 0.16159880439489882 2003 0.29708092402583475 2004 0.6277264175343902 2005 0.8878104339515005 2006 1.1058045137279464 2007 1.3453357106778583 2008 0.5772839752890491 2009 -0.22153294735022655 2010 2.072214388203136 2011 -0.43833505020107566 2012 0.8401383680992183 2013 1.1911647903176856 2014 0.10661613775984335 2015 0.9981739978316853 2016 1.057096027288651 2017 1.5004650179314183 2018 1.4819536538616376 2019 1.1494044451344791 2020 -8.589153981309579 2021 5.857729662988831 2022 2.3249894822919543 2023 0.256042696732834