Year	Percent
1950	12.91433
1955	11.95469
1960	11.78449
1965	11.21054
1970	13.21625
1975	15.029
1980	14.53048
1985	12.44002
1990	11.34561
1995	12.44748
2000	10.97556
2005	11.53663
2010	11.13676
2015	11.50583
2020	11.51836
2025	10.6078
2030	9.66198
2035	9.43609
2040	9.53444
2045	9.56899
2050	9.33865
2055	8.78452
2060	8.158
2065	7.75398
2070	7.64
2075	7.58133
2080	7.38273
2085	7.00813
2090	6.59432
2095	6.27255
2100	6.11537