Year	Percent
1950	5.99606
1955	5.81061
1960	5.45246
1965	5.35786
1970	5.45168
1975	5.55021
1980	5.5608
1985	5.62509
1990	6.52062
1995	7.17057
2000	8.07249
2005	8.04233
2010	8.01732
2015	8.67259
2020	10.12653
2025	11.94195
2030	13.96194
2035	15.98803
2040	17.86391
2045	19.72456
2050	21.13719
2055	22.3612
2060	23.45375
2065	24.69249
2070	25.89094
2075	27.28
2080	28.45379
2085	29.44491
2090	30.30866
2095	31.09213
2100	31.81749