Year	Percent
1950	11.42167
1955	11.38048
1960	12.55096
1965	12.78591
1970	12.34614
1975	11.73484
1980	9.82095
1985	6.90667
1990	7.39835
1995	7.29172
2000	7.4516
2005	7.83957
2010	7.37098
2015	6.86882
2020	6.3887
2025	5.30726
2030	5.33385
2035	5.57674
2040	5.86155
2045	5.86093
2050	5.6072
2055	5.31774
2060	5.20033
2065	5.28227
2070	5.39593
2075	5.39147
2080	5.26212
2085	5.10235
2090	5.0199
2095	5.03407
2100	5.10011