Year	annual %
1961	4.817806627941779
1962	5.076406151963829
1963	5.0972158445860565
1964	4.795368602410136
1965	4.302279519237537
1966	3.863037825494521
1967	3.382810005577191
1968	3.1410277408427465
1969	3.2647255459534406
1970	3.421339818533453
1971	3.147338690069051
1972	3.477070983292014
1973	3.62491048109561
1974	3.515520010739083
1975	3.2460700093464308
1976	3.0231702085316647
1977	2.7968913757992433
1978	2.61643048095154
1979	2.502363542173316
1980	3.6626093321063764
1981	6.775262670586983
1982	6.009843830986068
1983	5.3121559503796885
1984	4.70076789554467
1985	4.148861758981055
1986	3.673715058493053
1987	3.250951223177998
1988	2.8847363812197018
1989	2.5574886455785015
1990	2.001456454568322
1991	0.8836960929785177
1992	0.8182230179326146
1993	1.0103740955233735
1994	1.093579290631434
1995	1.084993807496453
1996	1.278560014933443
1997	1.0825895397219192
1998	0.724660564284048
1999	0.6460799298390811
2000	0.3709136528281934
2001	0.15690897055738454
2002	0.07062310823466506
2003	0.005298190336376952
2004	-0.03900791222021696
2005	-0.20372076477407167
2006	-0.48298500443813763
2007	-0.6462523099668817
2008	-0.6473140852026591
2009	-0.6071550644533302
2010	-0.5690420314462378
2011	-1.2119932067322707
2012	-1.2601176905692746
2013	-1.1886146490868572
2014	-1.6704860974135614
2015	-1.7880390243471038
2016	-1.9584844082981643
2017	-2.4340534074206137
2018	-4.0579885915793135
2019	0.008499520150324482
2020	2.719327483380361
2021	-0.5647465085293404
2022	-1.2944217353423957
2023	-0.423241126054366