填空题 33.  In 2001, how many categories each comprised more than 25 million workers?

填空题 34.  What is the ratio of the number of workers in the Agricultural category in 2001 to the projected number of such workers in 2025?

填空题 35.  From 2001 to 2025, there is a projected increase in the number of workers in which of the following three categories?
    Category 1: Sales
    Category 2: Service
    Category 3: Clerical