Year	base year varies by country
1970	34.28217309782997
1971	37.10829440057752
1972	40.16740046063165
1973	43.478684941472316
1974	47.06294035589518
1975	50.94266782379455
1976	52.07890591804899
1977	53.24049352011144
1978	54.42797817391184
1979	55.64196240723318
1980	56.88301609128015
1981	60.872056493799484
1982	65.24076089545594
1983	67.33998329185312
1984	69.32748043153424
1985	71.30691945752747
1986	73.944009674776
1987	75.80705906411949
1988	77.70626258796516
1989	80.149210715326
1990	84.47922728311563
1991	89.43826761552597
1992	93.03686474282874
1993	96.10883458796421
1994	96.92802863472382
1995	98.66881116108327
1996	99.47337673050359
1997	99.98537245243125
1998	100
1999	100.81919278590168
2000	102.38443286055818
2001	103.39379587067032
2002	104.06670480831635
2003	104.72498529524756
2004	105.57343431745896
2005	106.83035770597276
2006	108.23505049087956
2007	115.35879773217226
2008	112.91700631836272
2009	101.73747447378246