Year	Percent
1950	3.41946
1955	3.83916
1960	4.52416
1965	5.01016
1970	6.57608
1975	8.35269
1980	9.21186
1985	10.17978
1990	12.89323
1995	14.23918
2000	14.89546
2005	15.57925
2010	18.43649
2015	21.79922
2020	25.99227
2025	30.22138
2030	32.90187
2035	35.278
2040	37.45517
2045	39.5155
2050	40.62545
2055	41.13121
2060	40.40306
2065	38.67797
2070	37.65952
2075	36.94894
2080	37.02302
2085	37.39835
2090	37.86405
2095	37.95191
2100	37.94706