As noted above, total electricity production in Ontario 2017 was 132.1 TWh. Adding imports of 6.6 TWh and subtracting exports of 19.1 TWh leaves 119.6 TWh usage within Ontario. With an estimated 2017 population of 14,193,384, electricity usage per person in Ontario in 2017 was 9,307 kWh per year, or about 60% of the Canadian average shown in the table Electricity per person and by power source displayed earlier in this article. (Note that this number includes all use—commercial, industrial and institutional use as well as household use—and it is at the point of production, i.e. before subtracting transmission and distribution losses.) Usage per person in Ontario may be lower than the national average because natural gas is more widely available and has a significant cost advantage for heating.