Year	annual % growth
1971	2.2281885884417534
1972	4.36941518342995
1973	4.6563905672097405
1974	-3.184123553505742
1975	-0.5930837769760444
1976	3.8228631838681366
1977	2.5011035464474816
1978	3.9371935766192507
1979	0.6555859434176625
1980	-1.7150660222768295
1981	0.9419072941323208
1982	0.509388027455941
1983	1.9840047330422124
1984	4.490955072486159
1985	3.156060050357496
1986	3.778988342534845
1987	3.0253287983855444
1988	4.798405812427916
1989	2.3726390027987634
1990	1.885614936714859
1991	0.5878327821628773
1992	1.3830149859784342
1993	-0.23612059137802532
1994	2.8097612664200255
1995	2.4384177065732047
1996	2.884106842357184
1997	3.256660669463571
1998	2.9379277708796394
1999	2.8506197357239387
2000	3.3130580538847596
2001	1.2165161849440977
2002	0.9075752571674656
2003	1.4680927200880376
2004	3.119199528267913
2005	2.1020999806225404
2006	2.823952613922188
2007	1.3505725202989112
2008	-2.4499196413132864
2009	-3.8197570278812236
2010	3.5437311697738494
2011	1.405808324109259
2012	1.377553234345342
2013	0.8554469010426686
2014	1.9351631432874115
2015	2.1114440959511
2016	1.0172512202075268
2017	2.265612915958812
2018	1.6669541622858333
2019	1.2144697874924901
2020	-5.209106960670894
2021	4.721526495764408