The table below shows the values of several activities in an economy for the years 2020 and 2021, measured in millions of current year dollars:

Item 2020 202 l Personal consumption expenditures 1,800 1,850 Gross private domestic investment 2,500 2,600 Construction of new houses 800 850 Government expenditures on goods and services Purchase of existing houses Inventories at beginning of year Inventories at end of year Export of goods and services Import of goods and services 9,000 9,200 Transfer payments 2,200 2,500