Year	Percent
1950	12.26008
1955	12.09599
1960	15.074
1965	15.68475
1970	15.96984
1975	15.15468
1980	14.04823
1985	13.69498
1990	13.71456
1995	12.33653
2000	11.39204
2005	9.93793
2010	9.39169
2015	9.04016
2020	9.25089
2025	8.51276
2030	7.7818
2035	7.15587
2040	6.71041
2045	6.43191
2050	6.22531
2055	5.99421
2060	5.72021
2065	5.45227
2070	5.24405
2075	5.11238
2080	5.03181
2085	4.96076
2090	4.86913
2095	4.77017
2100	4.684