Year	Percent
1950	11.32275
1955	10.99411
1960	12.0961
1965	13.50158
1970	12.90713
1975	14.774
1980	13.02185
1985	10.6273
1990	8.48398
1995	8.69518
2000	8.94623
2005	8.4147
2010	7.61841
2015	7.24092
2020	7.31465
2025	5.87623
2030	6.08183
2035	5.80859
2040	5.85487
2045	6.06463
2050	6.1546
2055	5.93832
2060	5.6531
2065	5.53055
2070	5.51147
2075	5.51462
2080	5.48016
2085	5.35342
2090	5.18288
2095	5.06643
2100	5.05365