Year	Percent
1950	11.36376
1955	10.91844
1960	10.42263
1965	10.76553
1970	9.71349
1975	12.55964
1980	12.01184
1985	10.79987
1990	7.23566
1995	6.93147
2000	7.70113
2005	6.6862
2010	6.09365
2015	5.3846
2020	4.91205
2025	5.15032
2030	5.00376
2035	4.86492
2040	4.66016
2045	4.48995
2050	4.43193
2055	4.49408
2060	4.5845
2065	4.62691
2070	4.60875
2075	4.57106
2080	4.54989
2085	4.5719
2090	4.61254
2095	4.62167
2100	4.598