Year	Percent
1950	16.8917
1955	19.04799
1960	17.74508
1965	17.41462
1970	16.13895
1975	12.62395
1980	11.28489
1985	11.1382
1990	11.06158
1995	10.29158
2000	9.60812
2005	9.41475
2010	8.54321
2015	7.99015
2020	7.2257
2025	6.83928
2030	6.61149
2035	6.37619
2040	6.08312
2045	5.77431
2050	5.52606
2055	5.35242
2060	5.2413
2065	5.13959
2070	5.02226
2075	4.88444
2080	4.75301
2085	4.65282
2090	4.58618
2095	4.54139
2100	4.50814