Year	Percent
1950	14.65167
1955	15.18476
1960	14.61149
1965	14.88429
1970	16.53111
1975	16.73479
1980	16.24144
1985	16.22267
1990	15.68336
1995	15.8787
2000	16.51025
2005	15.39711
2010	13.75905
2015	13.28564
2020	13.00724
2025	12.56847
2030	11.88898
2035	11.14012
2040	10.47666
2045	9.94839
2050	9.51116
2055	9.08616
2060	8.64238
2065	8.1853
2070	7.77518
2075	7.4067
2080	7.08965
2085	6.79519
2090	6.5159
2095	6.25773
2100	6.01427