Year	Percent
1950	14.66747
1955	16.74402
1960	17.86991
1965	18.0489
1970	17.89937
1975	17.86927
1980	18.23112
1985	18.8354
1990	18.48914
1995	17.41743
2000	16.55873
2005	15.9773
2010	15.64119
2015	15.23557
2020	14.34232
2025	13.45854
2030	12.70377
2035	12.10028
2040	11.58133
2045	11.07542
2050	10.56081
2055	10.03714
2060	9.57443
2065	9.16108
2070	8.80974
2075	8.45085
2080	8.10007
2085	7.77177
2090	7.47038
2095	7.21159
2100	6.97965