Year annual % 1966 4.30924726835687 1967 2.6654711423775552 1968 0.5790585336953313 1969 0.9148995324467677 1970 0.4695942699212594 1971 1.3676827151242463 1972 3.6002063361928833 1973 2.3677770903270243 1974 2.8662935646686805 1975 0.5831345345661987 1976 2.7768135138278325 1977 4.527186774263754 1978 3.146219438420033 1979 -6.050364901101389 1980 -17.254536874444796 1981 -6.553718704041884 1982 -7.341767926956436 1983 -0.4047677965421883 1984 -0.6256441045008643 1985 -1.3361348962709059 1986 -1.7006814413075375 1987 0.5577789363903349 1988 -0.15606054750692522 1989 -0.9588422623482984 1990 2.950893418816335 1991 -0.25087841418179835 1992 5.265264510134287 1993 4.337851702823059 1994 3.550975522405679 1995 3.7291019734667827 1996 -0.03968487350526573 1997 2.334810370286064 1998 1.9119180036168046 1999 1.4934282612727827 2000 0.5401634174610166 2001 0.38073246322333887 2002 1.1812444267594913 2003 1.3029375707416762 2004 0.7422071896404816 2005 2.6440625078203226 2006 4.395456989406583 2007 1.684235047988409 2008 1.7509097750384655 2009 -2.4798307448903785 2010 1.772480978800317 2011 3.3793624872534735 2012 2.4879247398742876 2013 1.7806559363642975 2014 1.3381131344982151 2015 2.0460163557366258 2016 2.2200853151654485 2017 1.9842112783177583 2018 2.2543630102889125 2019 2.374265939895494 2020 -8.076269165638877 2021 11.524855615514113 2022 2.438981035745286 2023 3.0466615323585984