Year	Percent
1950	12.21554
1955	10.69626
1960	10.39006
1965	10.25705
1970	9.45417
1975	7.80028
1980	6.4481
1985	6.25958
1990	6.45481
1995	6.58133
2000	6.31477
2005	6.35418
2010	5.7609
2015	5.43112
2020	5.42188
2025	5.43366
2030	5.37156
2035	5.24879
2040	5.09825
2045	4.98636
2050	4.97988
2055	5.05055
2060	5.09169
2065	5.06859
2070	4.99146
2075	4.91323
2080	4.8786
2085	4.88805
2090	4.89997
2095	4.8862
2100	4.84209