Year % of relevant age group 1974 17.9868698120117 1977 18.9679908752441 1978 20.6745491027832 1980 27.6641998291016 1981 35.8829002380371 1984 21.7596206665039 1985 20.9974803924561 1993 34.1708297729492 2016 82.9104614257812 2017 87.2533264160156 2018 88.7355194091797 2019 86.1755218505859