Year	Percent
1950	11.40516
1955	9.95298
1960	8.66234
1965	8.32329
1970	10.22179
1975	11.43698
1980	11.7724
1985	11.17389
1990	10.62606
1995	10.6765
2000	11.12191
2005	10.23225
2010	9.54681
2015	8.20704
2020	7.78417
2025	7.65834
2030	7.99458
2035	7.47925
2040	6.92805
2045	6.44871
2050	6.12107
2055	5.94374
2060	5.8305
2065	5.68974
2070	5.4981
2075	5.2986
2080	5.14201
2085	5.0467
2090	4.99273
2095	4.94389
2100	4.87189