Demographers studying the current population of a particular country produce the age-structure diagram shown in the figure below: All of the following conclusions are supported by this diagram except

the birth rate has decreased during the past 15 years
there are currently more than 2 million people living in the country
approximately 1.7 million children were born during the past 5 years
most of the people in the country who are less than 20 years old are women