Year	Percent
1950	16.01825
1955	16.48956
1960	15.97371
1965	14.6247
1970	10.16769
1975	9.14856
1980	7.90234
1985	7.38415
1990	6.43274
1995	5.42271
2000	4.37497
2005	3.25917
2010	3.33641
2015	3.79638
2020	4.84319
2025	5.01382
2030	4.84863
2035	4.20296
2040	3.85518
2045	3.95216
2050	4.31402
2055	4.67871
2060	4.85662
2065	4.77758
2070	4.57139
2075	4.46963
2080	4.56173
2085	4.76177
2090	4.91209
2095	4.92369
2100	4.79316