Year	Percent
1950	15.72097
1955	16.43217
1960	16.01665
1965	18.22036
1970	18.46314
1975	12.9727
1980	13.4925
1985	11.60191
1990	13.37619
1995	13.96838
2000	11.40633
2005	9.91365
2010	8.62558
2015	8.85483
2020	8.90877
2025	8.4561
2030	7.53856
2035	6.61173
2040	6.09795
2045	5.97958
2050	5.91252
2055	5.67619
2060	5.29014
2065	4.91671
2070	4.71936
2075	4.70775
2080	4.74712
2085	4.70715
2090	4.56781
2095	4.40054
2100	4.30414