Year	Percent
1950	10.96979
1955	11.73694
1960	13.39753
1965	11.99046
1970	10.89174
1975	10.81284
1980	9.65802
1985	8.93026
1990	8.77499
1995	8.27539
2000	7.58685
2005	6.39886
2010	5.80018
2015	5.27023
2020	5.39484
2025	5.37618
2030	5.20548
2035	4.925
2040	4.66011
2045	4.53953
2050	4.57343
2055	4.66906
2060	4.71595
2065	4.67017
2070	4.59406
2075	4.56252
2080	4.60885
2085	4.69735
2090	4.75058
2095	4.74799
2100	4.69193