According to the map, the highest ownership rate of televisions is found in

North America.

Explanation:

While the first television demonstration took place in 1927, 9% of American households owned a TV in 1950. The number of TV households has dramatically changed by the year 2000, when, according to the estimates, 98% of American households had at least one TV. In 2019, Nielsen's National Television Household Universe found that 119.9 million households owned a TV in season 2018/19.

Darker colors on the map represent the highest television usage. According to the map, the highest rate of television ownership/usage is found in North America.