Year	Percent
1950	7.76192
1955	5.55572
1960	10.55594
1965	11.21047
1970	13.18074
1975	12.6939
1980	9.24772
1985	8.05903
1990	7.1045
1995	6.80727
2000	6.14839
2005	5.80888
2010	4.54871
2015	3.25525
2020	3.42464
2025	3.49305
2030	4.12723
2035	4.31735
2040	4.25623
2045	3.74474
2050	3.46875
2055	3.57703
2060	3.92719
2065	4.29745
2070	4.51688
2075	4.50584
2080	4.36279
2085	4.29469
2090	4.38725
2095	4.57033
2100	4.70402