Year	Percent
1950	8.9009
1955	7.04973
1960	9.31073
1965	10.03095
1970	8.21084
1975	7.61589
1980	7.43741
1985	7.67889
1990	7.85428
1995	7.53326
2000	6.99346
2005	6.3983
2010	5.74053
2015	5.63509
2020	5.27507
2025	5.18104
2030	5.16702
2035	5.11875
2040	5.03019
2045	4.94186
2050	4.87566
2055	4.83349
2060	4.8408
2065	4.86304
2070	4.86174
2075	4.84507
2080	4.8203
2085	4.8119
2090	4.82029
2095	4.82926
2100	4.81883