The figure was calculated by dividing the number of marriages for each year by the number of divorces. In 1990, there were 143,127 marriages and 20,482 divorces, for a ratio of 5.2 to 1.
算法是以當年結婚對數除以當年離婚對數，如民國七十九年有 143,712 對結婚，有 20,482 對離婚，相除之下結婚與離婚的比例為 5.2︰1。