Year	Percent
1950	11.09766
1955	11.55954
1960	9.4064
1965	8.70158
1970	8.50909
1975	8.69387
1980	8.75114
1985	8.24341
1990	7.69042
1995	6.75241
2000	6.30658
2005	5.78637
2010	5.40789
2015	5.28692
2020	5.24788
2025	5.16501
2030	5.03861
2035	4.9197
2040	4.83683
2045	4.78572
2050	4.77812
2055	4.77626
2060	4.74851
2065	4.71101
2070	4.67458
2075	4.662
2080	4.67092
2085	4.68271
2090	4.6772
2095	4.65723
2100	4.62919