1a. Are the numbers on the vertical axis relative numbers or absolute numbers?
1b. In 2005 exactly 3496 people were born from a multiple birth. Calculate how many births there were in total.
1c. In 1950 a total or 2908 people were born from a multiple birth. In 1980 1952 were born. With which percentage did the amount of people born from multiple births drop in the period 1950-1980?
1d. John claims the total amount of births from multiple births between 2005 and 2007 dropped with almost 10%. How did he come up with that percentage? What is he doing wrong?
Per 1000 geboortes = per 1000 births
Tijd in jaren = time in years
