Year	Percent
1950	4.74855
1955	4.4919
1960	5.11553
1965	5.97539
1970	6.69233
1975	6.42325
1980	5.75849
1985	5.83113
1990	9.00366
1995	12.28361
2000	14.57238
2005	15.07021
2010	16.64239
2015	19.56287
2020	22.32525
2025	25.16498
2030	26.73894
2035	28.53582
2040	30.26326
2045	32.01365
2050	33.90713
2055	35.64771
2060	37.50447
2065	37.63167
2070	37.72863
2075	37.53685
2080	37.39314
2085	37.45281
2090	37.56331
2095	37.54783
2100	37.46317