Year	Percent
1950	10.37687
1955	9.90308
1960	9.1147
1965	10.04684
1970	11.31237
1975	9.86914
1980	9.19632
1985	9.27745
1990	8.2547
1995	8.06667
2000	8.21414
2005	7.84417
2010	7.37453
2015	6.12569
2020	5.63457
2025	5.21422
2030	5.389
2035	5.43622
2040	5.32668
2045	5.08495
2050	4.83771
2055	4.73223
2060	4.79176
2065	4.9233
2070	5.0038
2075	4.97478
2080	4.89389
2085	4.84292
2090	4.86349
2095	4.92847
2100	4.96468