Year	annual % growth
1971	1.172037045091031
1972	3.2697076345765055
1973	3.6588115522524305
1974	-6.238616347750934
1975	0.9517309028315992
1976	1.2590946282497981
1977	0.6474790994497539
1978	4.9787182453875545
1979	0.99086092898591
1980	-1.4544573106031464
1981	-1.1676826009672396
1982	2.072447191616817
1983	4.005259719696227
1984	1.7835508669089535
1985	2.713759337177393
1986	5.5884505382837375
1987	4.138695192560789
1988	5.45668682665675
1989	1.8530015370990043
1990	0.5085663767664244
1991	-0.33992324543031316
1992	2.4509367936043134
1993	3.4851884466958154
1994	5.621147001795521
1995	2.2388599871187296
1996	2.515845602054128
1997	6.832130225506816
1998	6.1427926731439015
1999	1.4744836887562514
2000	3.6661218052852433
2001	2.468712097628
2002	2.4569482935056612
2003	3.0723143825831585
2004	1.9325067980491042
2005	2.350567403922966
2006	-0.46445394826454844
2007	1.0926597415312358
2008	-3.2099919394223235
2009	-4.254212297478574
2010	3.4815606693004355
2011	0.14556217672061678
2012	-0.45031332389952183
2013	0.978906837473815
2014	3.430994446827839
2015	2.131109785131869
2016	1.0575298440861332
2017	2.4228246076970663
2018	0.2264891365415309