Year	Percent
1950	12.64834
1955	12.8703
1960	13.11677
1965	12.09747
1970	10.39056
1975	9.84455
1980	9.14914
1985	8.81937
1990	8.42681
1995	8.49235
2000	7.55576
2005	7.0544
2010	7.34903
2015	6.84102
2020	6.45897
2025	6.15822
2030	5.8316
2035	5.57098
2040	5.42751
2045	5.34232
2050	5.24033
2055	5.11091
2060	4.98983
2065	4.88689
2070	4.81641
2075	4.77599
2080	4.73938
2085	4.69708
2090	4.64522
2095	4.60037
2100	4.56371