Year	Percent
1950	5.88057
1955	5.59273
1960	5.18969
1965	5.05134
1970	5.13884
1975	5.24431
1980	5.24418
1985	5.32136
1990	6.09675
1995	6.65145
2000	7.36262
2005	7.37785
2010	7.35373
2015	8.11741
2020	9.4972
2025	11.12401
2030	12.93697
2035	14.73697
2040	16.35131
2045	17.93674
2050	19.19741
2055	20.33027
2060	21.40814
2065	22.65211
2070	23.80912
2075	25.16271
2080	26.29911
2085	27.26215
2090	28.11945
2095	28.93013
2100	29.71184