Year	Percent
1950	19.93289
1955	18.7587
1960	17.10446
1965	16.72589
1970	16.23039
1975	15.53207
1980	15.34267
1985	13.95624
1990	12.34816
1995	14.16788
2000	17.01407
2005	21.15705
2010	25.32195
2015	29.04877
2020	29.7709
2025	29.296
2030	27.80808
2035	25.74252
2040	23.07753
2045	20.8503
2050	20.69131
2055	22.22947
2060	24.02254
2065	25.02088
2070	24.69754
2075	23.38768
2080	22.7454
2085	22.9396
2090	23.28836
2095	23.24369
2100	22.76058