Year	Percent
1950	11.65514
1955	11.98172
1960	9.70277
1965	8.96705
1970	8.79887
1975	8.98164
1980	9.03375
1985	8.51673
1990	8.00445
1995	7.0067
2000	6.5828
2005	6.06311
2010	5.66752
2015	5.53747
2020	5.49878
2025	5.41429
2030	5.28454
2035	5.15962
2040	5.06735
2045	5.00382
2050	4.98372
2055	4.96962
2060	4.92839
2065	4.87616
2070	4.82364
2075	4.79541
2080	4.79061
2085	4.79016
2090	4.77416
2095	4.74574
2100	4.71109