Year	Percent
1950	9.52993
1955	10.94985
1960	11.24659
1965	11.29154
1970	10.45008
1975	8.19845
1980	7.16561
1985	6.79934
1990	6.70704
1995	6.56606
2000	6.41013
2005	5.58871
2010	5.08821
2015	5.25048
2020	5.1846
2025	5.09088
2030	4.96367
2035	4.82998
2040	4.70858
2045	4.71048
2050	4.79354
2055	4.86214
2060	4.87775
2065	4.84622
2070	4.80508
2075	4.78411
2080	4.79304
2085	4.80643
2090	4.80602
2095	4.77814
2100	4.73373