Year	Percent
1950	8.6562
1955	11.71125
1960	9.65356
1965	10.08772
1970	10.51403
1975	12.32154
1980	11.78664
1985	11.0971
1990	10.67389
1995	8.97805
2000	8.33109
2005	6.7587
2010	7.49231
2015	6.5515
2020	5.14685
2025	4.57209
2030	4.43922
2035	4.51398
2040	4.61285
2045	4.75332
2050	4.65505
2055	4.35264
2060	4.23738
2065	4.35333
2070	4.57356
2075	4.7921
2080	4.91177
2085	4.8602
2090	4.70518
2095	4.62877
2100	4.67963