Year	annual % growth
1973	-3.1731712789197957
1974	9.35218251994958
1975	0.9166807933289363
1976	3.711712798089195
1977	8.598449863210519
1978	13.313336041175688
1979	-11.994827185497357
1980	32.73451797231837
1981	17.80954625558286
1982	5.202556393783027
1983	6.4720652377498595
1984	1.8415243501572292
1985	4.476659086222796
1986	-10.787980806697448
1987	-14.53322700878789
1988	-3.0483712535164074
1989	3.7911298992198965
1990	-0.7321465958396232
1991	-2.812343451978734
1992	-2.31777067696693
1993	-8.099075652089127
1994	0.7334154379685884
1995	-1.1313793098892546
1996	-0.43383704222407005
1997	1.5850872358800245
1998	6.625736464721271
1999	-0.6264088436670932
2000	19.488188383995947
2001	-0.0497471547495536
2002	2.1667133302882178
2003	9.07805251095057
2004	6.443029142988934
2005	10.430826488180884
2006	8.325639826748187
2007	7.173412310411777
2008	7.231077071917923
2009	-8.640844941612897
2010	13.649530895594594
2011	4.61639231280175
2012	8.975599554721896
2013	0.8439859012185877
2014	-0.7578843495428913
2015	-1.3647147190877291
2016	4.677232387852996
2017	1.6193662561267814
2018	-0.15385400539932448
2019	0.12446154556795364
2020	-6.14411790903246
2021	4.054725390603963