Year	Percent
1950	16.70704
1955	16.36486
1960	15.87251
1965	15.45251
1970	14.91979
1975	14.21586
1980	13.45038
1985	12.65756
1990	11.8793
1995	11.59486
2000	11.21184
2005	10.79913
2010	10.52672
2015	10.41024
2020	10.6398
2025	11.16051
2030	11.93473
2035	12.88852
2040	14.00132
2045	15.23285
2050	16.48999
2055	17.71057
2060	18.86458
2065	19.93184
2070	20.90148
2075	21.74996
2080	22.47193
2085	23.07069
2090	23.56715
2095	23.98615
2100	24.34961