Year	annual %
1961	2.8118609840880566
1962	2.811273122096594
1963	2.801514376666333
1964	2.7775528403268765
1965	2.7441662907334603
1966	2.6911353074468423
1967	2.6352580178395755
1968	2.586700252881016
1969	2.542185530071791
1970	2.5041361376134432
1971	2.475304939468387
1972	2.452835418943451
1973	2.4360670795782795
1974	2.412454178761436
1975	2.3793839058021717
1976	2.3455550380125203
1977	2.3419358127038947
1978	2.3462268543796654
1979	2.3162319326497993
1980	2.2630983189017257
1981	2.177364312381002
1982	2.130552241195076
1983	2.120954615663706
1984	2.0865591340092777
1985	2.040708215356446
1986	1.9955854096988475
1987	1.956522637891453
1988	1.9302167557275283
1989	1.8981575308341263
1990	1.8929287882070582
1991	1.8682412099009724
1992	1.8140453267026686
1993	1.7752935906206488
1994	1.7419108683453146
1995	1.7021299700106738
1996	1.652965534015081
1997	1.6102907620012559
1998	1.5678831171251915
1999	1.5224670229514459
2000	1.4729466124962443
2001	1.4209470291050224
2002	1.3708017184371926
2003	1.3137794372012195
2004	1.2746555833348765
2005	1.244212291015529
2006	1.2006668497181607
2007	1.1621980279477526
2008	1.1253104521902202
2009	1.1020213912831878
2010	1.0529229547739902
2011	1.1269214730403405
2012	1.1132286461926384
2013	1.0799569075198008
2014	1.0522623239154
2015	1.031361266185371
2016	1.0102162730111957
2017	0.9762713647494934
2018	0.9200185982465996
2019	0.8860766529029291
2020	0.8119063971730753
2021	0.6833848278749741
2022	0.6608242677582155
2023	0.7353738894732231