Year	Percent
1950	17.31892
1955	16.8921
1960	15.72005
1965	13.4912
1970	12.39503
1975	10.70733
1980	12.22977
1985	10.04301
1990	8.29381
1995	7.57636
2000	7.26582
2005	6.03043
2010	3.40546
2015	3.48451
2020	3.31754
2025	3.15651
2030	2.99291
2035	2.83651
2040	2.74942
2045	2.77134
2050	2.80802
2055	2.83218
2060	2.8217
2065	2.80038
2070	2.80013
2075	2.83011
2080	2.89133
2085	2.95802
2090	3.01707
2095	3.06833
2100	3.1149