Year	Percent
1950	16.29218
1955	16.51014
1960	16.84612
1965	16.73728
1970	14.08085
1975	13.77654
1980	12.31031
1985	12.8991
1990	11.37525
1995	11.25489
2000	9.83625
2005	8.7072
2010	7.82201
2015	7.56962
2020	7.1981
2025	6.79725
2030	6.34844
2035	5.91919
2040	5.64878
2045	5.58373
2050	5.57359
2055	5.48993
2060	5.34933
2065	5.20159
2070	5.09428
2075	5.04901
2080	5.04934
2085	5.04589
2090	5.00687
2095	4.94404
2100	4.88697