year	marriage.rate
1974	37.55
1975	34.82
1976	33.29
1977	30.35
1978	29.43
1979	28.71
1980	28.84
1981	28.95
1982	30.27
1983	28.18
1984	27.96
1985	26.54
1986	25.28
1987	24.96
1988	23.41
1989	22.18
1990	22.19
1991	21.33
1992	19.87
1993	19.41