differences in ownership of electrical devices

The given charts illustrate the differences in ownership of electrical devices, moreover, the number of hours that has been spent while doing housework in the household in a particular country from 1920 to 2019. Overall, the highest percentages of using those three appliances: washing machines, refrigerators and vacuum cleaners were in 2019, 2000 and 2019, respectively; however, the percentage of the refrigerator in 1980 was at its highest too. Although the portions were the lowest in 1920, the time spent while using them was the highest. And the lowest was in 2019. The proportion of using washing machine varied across the years, as it increased from 40% to 60 by the year 1960 and it reached 70% in the years of 1960 and 2000, however, it decreased to 65% in 1980 then it became 75% in 2019. Firstly, the usages of the refrigerator were 0% in 1920 then, it started to raise till passing by 1940 it was 55% after that, it raised to 90% in 1960 and finally, it reached its maximum of 100% in the years of 1980, 2000 and 2019. The vacuum cleaner’s usages have been raised constantly through the years of 1920, 1940, 1960, 1980 by ratios of 30%, 50%, 70% and 90%, respectively. By the years 2000 & 2019, it turned to 100%. The numbers of hours per week of using those devices through the years were 50, 35, 20, 15, 15, 10.