Year	Percent
1950	12.11064
1955	11.54371
1960	8.40046
1965	10.3323
1970	11.09238
1975	10.80504
1980	10.75573
1985	9.37393
1990	8.52631
1995	7.52624
2000	7.51628
2005	7.57923
2010	6.7888
2015	6.60197
2020	5.0465
2025	4.97915
2030	4.74515
2035	4.81015
2040	4.97286
2045	4.93461
2050	4.69304
2055	4.49485
2060	4.47018
2065	4.58576
2070	4.74636
2075	4.83075
2080	4.79035
2085	4.7097
2090	4.68971
2095	4.75225
2100	4.84373