Year	Percent
1950	10.28651
1955	8.56223
1960	6.88569
1965	9.18898
1970	9.81558
1975	8.01155
1980	7.46229
1985	7.37807
1990	7.67774
1995	7.93491
2000	7.09777
2005	7.24807
2010	6.57516
2015	6.09267
2020	5.97721
2025	5.59441
2030	5.50412
2035	5.51148
2040	5.47688
2045	5.3843
2050	5.2784
2055	5.1948
2060	5.14228
2065	5.14571
2070	5.16219
2075	5.14727
2080	5.11146
2085	5.06526
2090	5.03764
2095	5.03039
2100	5.0277