Year	Percent
1950	14.13884
1955	14.09757
1960	13.862
1965	13.56435
1970	13.04685
1975	12.30992
1980	11.58515
1985	10.93046
1990	10.34873
1995	10.52157
2000	11.23698
2005	12.05629
2010	12.58325
2015	11.63016
2020	11.38297
2025	11.91649
2030	12.9808
2035	14.15497
2040	14.6257
2045	14.92108
2050	15.63085
2055	16.68773
2060	18.02889
2065	19.17813
2070	19.81142
2075	20.24544
2080	20.7476
2085	21.42876
2090	22.17176
2095	22.78204
2100	23.18146