The provided illustration depicts 2 graphs. The upper graph shows the change in the percentage of households in a country with 3 types of electrical appliances, while the lower graph plots the number of housework hours per week. Both of these graphs are plotted over a span of 99 years, from 1920 to 2019.
The major trend in the upper graph is that the percentage of households having each appliance rose across all 3 cases, while the predominant trend in the lower graph is that the number of housework hours declined gradually over the aforementioned time period.
Focusing on the first graph, the rate at which the usage of electrical appliances increased varied across the 3 types. There were practically no refrigerators in use back in 1920, but they saw an exponential surge in utility over the next 40 years and eventually found their way into every household, starting from the year 1980. On the other hand, the use of vaccum cleaners saw steady growth until 2000, when it also reached every household. The washing machine, unlike the other two, had its ups and downs in ownership rates, and ended up in about 75% of households.
As is apparent in the second graph, the number of weekly housework hours steadily decreased from 50 to 20 until 1960, after which the rate of decline plateaued. Gradually, the number of weekly hours fell to 10 in 2019.
