Divorce rate means the percentage of people getting a divorce every year. Your 40-50% figure must be the total percentage of marriages that end in divorce.
Now the GP said "divorce rate", so I take it they meant the former. If it's the latter, then 1% is abnormally low (and can't be simply explained with happy marriages).
Now the GP said "divorce rate", so I take it they meant the former. If it's the latter, then 1% is abnormally low (and can't be simply explained with happy marriages).