Year	Percent
1950	10.96099
1955	10.73987
1960	10.41909
1965	10.68999
1970	9.72442
1975	12.69334
1980	12.2384
1985	11.08184
1990	7.47742
1995	7.06848
2000	7.98902
2005	7.10115
2010	6.49211
2015	5.70919
2020	5.23822
2025	5.46899
2030	5.29944
2035	5.14956
2040	4.92722
2045	4.73742
2050	4.66364
2055	4.71634
2060	4.7958
2065	4.81937
2070	4.77956
2075	4.72509
2080	4.69833
2085	4.71979
2090	4.75879
2095	4.76636
2100	4.74094