Year	Percent
1950	15.35663
1955	20.09851
1960	18.95719
1965	17.87675
1970	17.46829
1975	17.77122
1980	16.91567
1985	17.29143
1990	16.13968
1995	15.1303
2000	14.97386
2005	13.41672
2010	11.53616
2015	10.80525
2020	10.33541
2025	9.69043
2030	8.89398
2035	8.12817
2040	7.52032
2045	7.08185
2050	6.74668
2055	6.43464
2060	6.13533
2065	5.8561
2070	5.63558
2075	5.47664
2080	5.35998
2085	5.26864
2090	5.17871
2095	5.09239
2100	5.01681