Year	Percent
1950	10.58747
1955	10.91562
1960	10.77291
1965	9.58329
1970	8.09988
1975	7.25147
1980	6.86825
1985	7.08838
1990	7.31076
1995	7.23571
2000	6.69154
2005	6.62854
2010	6.50806
2015	6.00135
2020	6.06591
2025	6.0985
2030	6.0038
2035	5.85884
2040	5.72944
2045	5.64724
2050	5.63029
2055	5.65634
2060	5.64634
2065	5.57893
2070	5.49
2075	5.41422
2080	5.37615
2085	5.35619
2090	5.33529
2095	5.29585
2100	5.23294