The number of people getting married is almost the same number of people having children
ご質問ありがとうございます。
「[結婚する](https://eikaiwa.dmm.com/uknow/questions/52526/)数と、子どもを産む数はほとんど同じ」は英語で「The number of people getting married is almost the same number of people having children」と言います。
また、「結婚する数と、子どもを産む数はほとんど同じです。少子化対策として、結婚する人を増やすのが大切です」という文脈で言いたいなら、そうすると「The number of people getting married is almost the same number of people having children. Therefore in order to tackle the problem of declining birthrate we need to figure out a way to have people get married.」と言えます。
ご参考になれば幸いです。
The number of marriages and the number of children is about the same.
"結婚する数と、子どもを産む数はほとんど同じ"
- The number of marriages and the number of children is about the same.
「結婚する数と、子どもを産む数はほとんど同じです。少子化対策として、結婚する人を増やすのが大切です」
- The number of marriages and the number of people who give birth is roughly the same. To combat against the declining birthrate, it's important to increase the number of marriages.
アメリカ合衆国 
