This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
# births
题目1：读取"births.csv"文件（births美国出生人口统计表），读取到适当数据结构中，并输出。（代码量30-50行）
题目2：完成如下表格 （60-100行）
gender F M ALL F-M
decade
1960 12349384 12334455 236.......... -200
1970 12334555 13454545
1980 ........ .........
......
ALL 10000000000 100000000000 20000000000