Year	Percent
1950	10.31785
1955	15.39708
1960	16.9338
1965	17.37747
1970	15.59705
1975	15.00898
1980	14.78768
1985	15.14587
1990	15.2916
1995	13.92877
2000	11.15522
2005	9.42104
2010	9.99852
2015	9.93203
2020	9.13
2025	7.98026
2030	7.09043
2035	6.6918
2040	6.53406
2045	6.33926
2050	5.98538
2055	5.60298
2060	5.31836
2065	5.18334
2070	5.13109
2075	5.08314
2080	4.9957
2085	4.87955
2090	4.7819
2095	4.73375
2100	4.72797