Year	Percent
1950	11.51938
1955	11.56663
1960	11.64682
1965	10.19412
1970	8.17631
1975	5.47108
1980	4.25825
1985	5.64595
1990	6.1787
1995	6.44682
2000	6.58764
2005	4.40761
2010	2.73093
2015	2.69252
2020	3.22589
2025	3.35267
2030	2.98978
2035	2.83685
2040	2.90958
2045	3.05788
2050	3.1474
2055	3.14189
2060	3.11903
2065	3.14984
2070	3.22377
2075	3.31363
2080	3.38534
2085	3.44564
2090	3.49703
2095	3.56881
2100	3.65266