Questions about example sentences with, and the definition and usage of "Oecd"

Q: OECD (2018) `` average sleep time in each country '' in Gender Date Portal
According to Japan, average sleep time is the lowest in the world. South Africa ranked first with 9.2 hours, while Japan at the bottom ranks 7.3 hours, almost two hours apart. From Fig. 2, it can be seen that the sleeping time of Japanese people is far less than in other countries.

According to Basement Ups Co., Ltd. (2019) `` Work Awareness Survey '', 41% for 5 to 6 hours, 26% for 4 to 5 hours, 17% for less than 4 hours, and finally 16% for 7 hours or more It has become. Japan's average sleep time is the lowest in the world, at 7.3 hours, but about 84% of working adults are below average. And I think that this serious lack of sleep seems to be related to the large difference between domestic and per capita GDP, given that 43% of people haven't even had five hours. The lack of sleep may have created a vicious cycle in which work efficiency is reduced and working hours are automatically extended. Does this sound natural?

Q: I think every OECD county should reduce carbon dioxide emissions. Does this sound natural?

Q: OECD has long watched people's income variations in its member countries. According to its latest report, the gap between the rich and the poor has considerably widened during the last few decades. In 2014, the richest 10% people in these countries earned 9.8 times more than the poorest 10%; the figure was about 7 times in the 1980s. Does this sound natural?

Q: According to a recent OECD's survey, junior high school teachers in Japan work the longest hours in the world. They work on average 54 hour a week, which is more than 10 hours longer than the world average of 39 hours. The shortest country is Chile, where the number is 29. The major reason for Japanese teachers' long hours is that they have to spend about 8 hours on overseeing extracurricular activities. Does this sound natural?