Year	Percent
1950	17.05239
1955	16.81168
1960	17.1543
1965	15.74674
1970	14.66167
1975	13.09573
1980	12.74098
1985	11.94536
1990	10.15905
1995	9.291
2000	8.54381
2005	8.64382
2010	8.51573
2015	7.53588
2020	6.81512
2025	6.24868
2030	5.92973
2035	5.80492
2040	5.66333
2045	5.37506
2050	5.03469
2055	4.76855
2060	4.63568
2065	4.60192
2070	4.59518
2075	4.51868
2080	4.38474
2085	4.25542
2090	4.1933
2095	4.20256
2100	4.23914