Year	Percent
1950	21.6335
1955	23.51893
1960	22.7697
1965	24.23095
1970	25.13687
1975	25.72537
1980	26.67854
1985	25.47092
1990	25.71028
1995	26.1343
2000	27.43809
2005	28.68621
2010	28.4514
2015	29.09593
2020	30.15537
2025	30.78826
2030	31.60984
2035	30.3876
2040	27.44856
2045	25.38831
2050	24.01072
2055	23.85377
2060	25.18564
2065	26.00072
2070	25.48054
2075	24.82785
2080	24.29023
2085	24.11482
2090	24.28628
2095	24.53417
2100	24.44779