Year	Percent
1950	9.74013
1955	14.98907
1960	14.14844
1965	11.7233
1970	10.56134
1975	7.97223
1980	8.14802
1985	8.64924
1990	8.15361
1995	7.58878
2000	6.85972
2005	6.28731
2010	4.94968
2015	4.9142
2020	5.08983
2025	5.0633
2030	5.03001
2035	4.82689
2040	4.53422
2045	4.36036
2050	4.39738
2055	4.54209
2060	4.64857
2065	4.65269
2070	4.58338
2075	4.51202
2080	4.52058
2085	4.61169
2090	4.71587
2095	4.7563
2100	4.72211