Year	Percent
1950	8.02894
1955	8.99887
1960	10.17985
1965	10.56195
1970	11.03186
1975	10.48792
1980	9.18068
1985	8.7312
1990	8.20724
1995	7.92739
2000	7.45235
2005	7.9226
2010	6.76837
2015	6.4504
2020	6.7646
2025	6.38092
2030	6.08375
2035	5.86513
2040	5.61536
2045	5.41816
2050	5.32416
2055	5.27879
2060	5.206
2065	5.09648
2070	4.993
2075	4.90825
2080	4.85739
2085	4.83493
2090	4.81234
2095	4.7757
2100	4.7268