Year	Percent
1950	10.56232
1955	10.23031
1960	10.05958
1965	10.41905
1970	10.12181
1975	10.86777
1980	10.26192
1985	9.30383
1990	7.57158
1995	6.59671
2000	6.73714
2005	7.06313
2010	7.57814
2015	7.2483
2020	6.36596
2025	5.68653
2030	5.43189
2035	5.59004
2040	5.83401
2045	5.86888
2050	5.65087
2055	5.35102
2060	5.17016
2065	5.17925
2070	5.28812
2075	5.37066
2080	5.33005
2085	5.18301
2090	5.02943
2095	4.94756
2100	4.94135