Year	Percent
1950	9.93294
1955	9.40479
1960	11.25054
1965	10.75256
1970	10.48236
1975	9.11462
1980	8.2041
1985	7.74121
1990	7.56398
1995	7.68695
2000	7.29209
2005	7.15104
2010	6.16265
2015	5.39642
2020	5.43765
2025	5.39595
2030	5.08206
2035	4.65931
2040	4.46718
2045	4.4141
2050	4.42809
2055	4.41785
2060	4.35848
2065	4.29704
2070	4.27249
2075	4.31189
2080	4.37772
2085	4.42746
2090	4.44814
2095	4.44649
2100	4.43921