Year	annual %
1968	1.8654899183499367
1969	-1.4458267366757696
1970	3.7128799177061182
1971	2.2819744991027875
1972	4.409528716638661
1973	-3.336487442232908
1974	-3.654588861541953
1975	9.166185270312411
1976	12.091677665365637
1977	5.289613045178925
1978	-2.5652043936773623
1979	6.37398696610407
1986	1.4111974512069025
1987	-1.4550729622216778
1988	5.380757094476024
1991	10.1239288103977
1992	-5.3059811340347665
1993	1.3837871874075063
1994	0.43262685912557686
1995	-1.868178830677735
1996	4.774955999647872
1997	2.325035179810243
1998	5.076830379085749
1999	3.380954654884661
2000	-2.6349189442473886
2001	7.752730034336366
2002	-1.4277261065046076
2003	8.702155682278473
2004	-1.6504990250052174
2005	3.1447407178752513
2006	0.6811175038444333
2007	0.22476492289558792
2008	1.8797447508842993
2009	-0.24732252808637156
2010	2.601050596712156
2011	0.18563944717064373
2012	-3.9223349925538145
2013	0.016516678108018823
2014	4.421960935022341
2015	3.330858707663694
2016	1.9986781062295051
2017	1.4759290260280267
2018	1.8541312893631101
2019	0.4267891366828138
2020	-4.733393226359425
2021	-0.491897570779372
2022	0.8955252501209827
2023	1.3961429171162507