Year	Percent
1950	14.55733
1955	12.79966
1960	12.18746
1965	9.90896
1970	7.24601
1975	7.67572
1980	8.24083
1985	7.87218
1990	7.23426
1995	6.59169
2000	6.02275
2005	4.84759
2010	4.57289
2015	4.81569
2020	4.86372
2025	4.81031
2030	4.59136
2035	4.30437
2040	4.15016
2045	4.20509
2050	4.36169
2055	4.46811
2060	4.46074
2065	4.37511
2070	4.28902
2075	4.28776
2080	4.38001
2085	4.49116
2090	4.54528
2095	4.52765
2100	4.46255