Year annual % 1967 1.3120410187313638 1968 1.801431153331734 1969 1.016672332127058 1970 3.4676984254291483 1971 10.287634627205513 1972 2.226039961986423 1973 15.627403881304119 1974 45.18803330567364 1975 5.638632838200856 1976 10.58148232844318 1977 10.770966531645243 1978 6.464929990554765 1979 23.098744280232467 1980 25.862038763110974 1981 9.909970030161674 1982 6.2983525029532785 1983 4.130029262969771 1984 2.4915645324877573 1985 1.6890483933093634 1986 2.405343252936106 1987 8.842020422323088 1988 3.6705965517075327 1989 8.489705890223043 1990 11.927009417696276 1991 5.435256956034124 1992 5.691544864963575 1993 3.0349824633210147 1994 6.8617322590587975 1995 7.775960276634528 1996 6.8826124867655025 1997 3.108444814174071 1998 -3.692767005989083 1999 7.942787116443078 2000 11.203727434774407 2001 1.2608154802248634 2002 3.592594551945645 2003 4.496528495539785 2004 11.023723612976923 2005 13.0482805838232 2006 9.872978935284628 2007 7.679814460766799 2008 17.349104044919812 2009 -5.076985607625495 2010 10.605107605522896 2011 12.415097862191033 2012 4.670767953289797 2013 1.5318938192584 2014 1.262304413510293 2015 0.19700167873683938 2016 0.8566882242959366 2017 4.986213144017199 2018 7.924854711765917 2019 0.8829928281558921 2020 1.0414184276851017 2021 12.695715219056254 2022 15.61274137130777 2023 -2.258254271681068