Year	annual % growth
1968	9.582682640195998
1969	2.4682713528473244
1970	6.2628975582452995
1971	-0.06476403099456718
1972	0.194423208890953
1973	9.184995117402366
1974	5.864936100788157
1975	12.423050318050088
1976	5.624688565029871
1977	-2.4976450655096016
1978	0.531661905187292
1979	14.5673042863897
1980	-3.953001380877822
1981	-20.30758348386844
1982	16.935308858518752
1983	29.654453402133413
1984	-2.1515841873290356
1985	-8.732769407238521
1986	-2.518628404852734
1987	-2.758160774951108
1988	-1.7991582473157308
1989	3.962504255255368
1990	-2.1721297166051556
1991	1.1311258888770652
1992	-2.775475857703185
1993	-4.686836013552778
1994	6.168980327907178
1995	-2.6385791631246036
1996	-2.4648894884026618
1997	10.204434561526668
1998	-2.961951650903444
1999	30.087885620521888
2000	7.496529478546307
2001	8.63316925186362
2002	-18.083160327381307
2003	19.461865928637565
2004	6.688587238649063
2005	-2.881219284343402
2006	-16.682202788310562
2007	-4.19855238196466
2008	30.973196727195358
2009	14.918590901676865
2010	11.807561913029986
2011	-27.73785321658083
2012	6.5068526291064614
2013	-2.6062826447898857
2014	-12.384620313587902
2015	3.9501527159790726
2016	-0.23456341317654505
2017	-4.379155461390084
2018	3.6912498894438954
2019	-0.11200211098937984
2020	10.590778604747669
2021	13.678545902878156
2022	3.645962085528481
2023	7.199995129312981