Usar "birthrate" en una oración

1. “You must realize that among our people, weddings are a very rare and special event, because of our low birthrate and longevity

2. Of these groups, only Group one and Group four keep a birthrate above

3. rockets to 30 percent, such is the birthrate of the immigrant communities

4. I have computed that it amounts to two hundredths of one percent of total slave ownership, an amount absolutely overwhelmed by the slave birthrate

5. Their birthrate increased from once every 4-5 years to one every 2-3 years