Year	annual %
1961	2.300190441551162
1962	2.2978278165126347
1963	2.308653192717289
1964	2.2239360104404233
1965	2.112951600943874
1966	1.915458345613586
1967	1.876107694283871
1968	1.6895823011708853
1969	1.561933007633255
1970	1.4539933024744691
1971	1.3474959640779798
1972	1.2220494251849023
1973	1.0776970790660483
1974	0.9946836634450115
1975	1.0395178563989673
1976	1.2277388960783093
1977	1.8203225517810866
1978	2.1221940677640734
1979	2.2145634442846256
1980	2.228675123778413
1981	2.2178865264621206
1982	2.199343025174896
1983	2.182120954726654
1984	2.1722922515839427
1985	2.1050887719295432
1986	1.8200126594588462
1987	0.5498267044795322
1988	0.0056773641323751445
1989	-0.1921175589405287
1990	-0.3085089949040593
1991	-0.7650684913384086
1992	-1.0961828241931584
1993	-1.0794002493978894
1994	-1.1979349590759785
1995	-1.243950278958663
1996	-0.9124282496398637
1997	0.16229542958688747
1998	0.4219012742725625
1999	0.4131873194909965
2000	0.34602110648956524
2001	0.29724888429816604
2002	0.25257641231148387
2003	0.21624899042774606
2004	0.1956867260338307
2005	0.16612436674766298
2006	0.14126227001616684
2007	0.059634772935964725
2008	-0.31519202538914143
2009	-0.5360286387049229
2010	-0.6478818076046914
2011	-0.724903752644322
2012	-0.7927929047599406
2013	-0.8331752711682768
2014	-0.8773840388061316
2015	-0.9412448914190552
2016	-1.0029586883046766
2017	-1.0686684052913689
2018	-1.15231153699237
2019	-1.2118024219886625
2020	-0.9429164485765658
2021	-0.7059020855797306
2022	-0.6076159125590976
2023	-0.4573064614142171