Year	Percent
1950	11.86571
1955	12.56249
1960	14.56282
1965	15.92157
1970	15.34797
1975	15.46131
1980	15.71851
1985	14.16109
1990	14.65875
1995	13.9543
2000	13.71728
2005	13.38196
2010	12.11972
2015	10.31962
2020	9.74901
2025	9.41834
2030	8.93789
2035	8.29635
2040	7.65754
2045	7.14427
2050	6.7758
2055	6.5008
2060	6.24275
2065	5.99196
2070	5.75406
2075	5.56705
2080	5.43575
2085	5.34057
2090	5.26701
2095	5.18984
2100	5.11308