Year	Percent
1950	15.37847
1955	18.64545
1960	17.44839
1965	17.46869
1970	17.38389
1975	15.05795
1980	13.9067
1985	13.10363
1990	14.03805
1995	11.23209
2000	9.82652
2005	8.81119
2010	7.90916
2015	7.8796
2020	7.26531
2025	6.73097
2030	6.32271
2035	5.96273
2040	5.66197
2045	5.42935
2050	5.23584
2055	5.06381
2060	4.9107
2065	4.79104
2070	4.7023
2075	4.63492
2080	4.57417
2085	4.52261
2090	4.47119
2095	4.43424
2100	4.40272