Year	%
1976	3.337382544380119
1977	3.3526829143667913
1978	2.417648019108269
1979	-0.8186529261965138
1980	-0.2053603099377212
1981	3.1945102866694444
1982	8.722557006343585
1983	4.367419455429592
1984	-16.190097399437832
1985	9.867206389175234
1986	14.230282883036793
1987	5.433439049441916
1988	5.613499006561152
1989	9.321476328231963
1990	9.8809821002737
1991	5.7377523302765745
1992	10.749925068668604
1993	7.3711786138728685
1994	4.539880390354565
1995	6.540052153822161
1996	6.640220276763528
1997	9.425890844027618
1998	5.771212913604213
1999	5.117438948927674
2000	4.810493244704654
2001	6.421884237404188
2002	4.708199924692162
2003	6.0852850467079875
2004	3.955247392606917
2005	4.03548972128816
2006	4.440119450086604
2007	5.357597018160811
2008	1.46657832194706
2009	5.672578240631656
2010	3.163508987336128
2011	2.6409504980993
2012	3.613268953071669
2013	3.6309341302733373
2014	2.399600236276986
2015	6.343586489517805
2016	4.306550983992501
2017	3.2319992686863053
2018	2.292106403152967
2019	6.3544615865094025