Year	annual %
1961	1.152235873753321
1962	1.004542832405771
1963	0.936313675182009
1964	0.8094607827800363
1965	0.6025953435989636
1966	0.34753298541866035
1967	0.1482792325074356
1968	0.12713386021433612
1969	0.43304517872869996
1970	1.083771816473012
1971	1.617457578412709
1972	2.012857936932734
1973	2.270684778164785
1974	2.2677778729679643
1975	2.189817145963246
1976	2.074905864458069
1977	2.0631816549457587
1978	2.0797157225947966
1979	2.0519773067243126
1980	2.053557760328243
1981	2.0384032111550345
1982	2.0038035445431
1983	1.9560010332310485
1984	1.8713608268598592
1985	1.792850793824775
1986	1.674761239562165
1987	1.4663650143813398
1988	1.309376872055106
1989	1.234663249049311
1990	1.122046848505969
1991	1.0150449079925166
1992	0.8447400790407619
1993	0.6759789148735624
1994	0.6196899795088023
1995	1.217472164943731
1996	1.199444188015695
1997	1.154336097897093
1998	1.038158828956454
1999	0.9302568966959811
2000	0.8879468701436983
2001	0.8783509850598333
2002	0.8688897446221278
2003	0.8912016373485518
2004	0.9234223815605622
2005	0.9266700196583364
2006	1.840393911280337
2007	1.8661616698438503
2008	1.8702597792092897
2009	1.8744634340076134
2010	1.8895254867594777
2011	1.8889731089463409
2012	1.86616014884636
2013	1.8222693808050934
2014	1.7472634940281693
2015	1.6805491287207246
2016	1.6442965565325156
2017	1.607594750573859
2018	1.52605094874008
2019	1.4540333478574536
2020	1.3339005362073604
2021	1.2333835664219268
2022	1.1698895075043203
2023	1.1109880156547502