Below is a hypothetical table such as would be generated by the Bureau of Labor Statistics when reporting historical and forecasted levels of gross domestic product for the United States. Use the answer table to fill in the blanks for the missing estimates.

Billions of Current Dollars Category 1998 2008 2018 2028 1. Gross domestic product $ $14,712 8 $20,494.1 $30,493.1 2. Personal consumption expenditures 5,877.2 9,976.3 13,948.5 3. Gross private domestic investment 1,736.7 3,650.1 5,822.0 Government expenditures 1,611.6 2,982.0 3,520.8 4,741.3 4. Exports 953.0 1,837.1 3,891.0 Imports 1,115.7 2,560.1 3,156.7 4,711.5