Year	Percent
1950	14.93147
1955	16.78138
1960	16.58961
1965	16.26925
1970	15.83305
1975	15.76397
1980	15.38607
1985	14.80562
1990	13.59062
1995	11.88109
2000	10.97782
2005	10.46931
2010	10.20116
2015	9.96079
2020	9.32876
2025	8.69542
2030	8.13668
2035	7.70092
2040	7.37258
2045	7.07909
2050	6.77238
2055	6.46949
2060	6.19061
2065	5.96871
2070	5.79211
2075	5.63836
2080	5.50384
2085	5.37392
2090	5.25939
2095	5.16814
2100	5.09987