Year	annual % growth
1971	5.92094866724922
1972	3.089994357572934
1973	7.218368733755881
1974	5.780375057551225
1975	1.4083446112382916
1976	5.265976409446793
1977	7.81647791125593
1978	6.706274501563044
1979	0.6655827748849106
1980	22.843822798992946
1981	13.913887273306798
1982	4.633770784003019
1983	219.2571614246811
1984	43.37295262413957
1985	37.92519154059616
1986	-5.4808602727433
1987	-17.533701780202676
1988	-61.286120983423956
1989	11.462058428274986
1990	55.38921157021929
1991	-21.459448900655048
1992	11.636025934949174
1993	38.42153721801074
1994	27.7760154397005
1995	3.6450671655563553
1996	-41.59504447884237
1997	-12.6802081993783
1998	-93.14847257767784
1999	-364.062878013096
2000	173.95193520597354
2001	29.552147572166263
2002	-128.95842044768023
2003	-446.2427276317973
2004	-88.41528925918541
2005	230.5453642636669
2006	-52.16511580374099
2007	-646.3124117561701
2008	-2.7546791305116045
2009	22.42853869930765
2010	1.0758357412503585
2011	3.8691648298255075
2012	4.219997362445298
2013	4.439967992277374
2014	2.681533451117872
2015	5.342833414141083
2016	6.108093351612482
2017	2.8285323486247904
2018	2.6947380628213864
2019	2.0527386730438337
2020	-3.5544684664607473
2021	4.637408695831709