The charts depict information changes in ownership of washing machine, refrigerator and vacuum cleaner and number of hours spend by household per week. washing machine, refrigerator, and vacuum cleaner usage showed an upward trend along with increasing years. washing machine usage was zero in 1920. then, it shoots up with 100% in 2000 and remains same in almost next two decade. washing machine also showed increasing usage with 60% in 1960. Despite one minor drop, it showed more than 50 % growth. The number of houses on household showed a downward trend. In 1920, most time is spent on work with 50 hours only. It falls, dropping by almost 40 hours in 1980 and remain plateau for two decades. After this, it reaches its lowest point at a mere 10 hours in 2019. over the period of time, people start using more appliances and spend less time in household work. 
The charts depict information  
changes
 in ownership of washing  
machine
, refrigerator and vacuum cleaner and number of  
hours
 spend by household per week.  
washing
  machine
, refrigerator, and vacuum cleaner usage  
showed
 an upward trend along with increasing years.  
washing
  machine
 usage was zero in 1920.  
then
, it shoots up with 100% in 2000 and remains same in almost  
next
 two decade.  
washing
  machine
  also
  showed
 increasing usage with 60% in 1960. Despite one minor drop, it  
showed
 more than 50 % growth. The number of  
houses
 on household  
showed
 a downward trend. In 1920, most time  
is spent
 on work with 50  
hours
  only
. It falls, dropping by almost 40  
hours
 in 1980 and remain plateau for two decades. After this, it reaches its lowest point at a mere 10  
hours
 in 2019.  
over
 the period of time,  
people
  start
 using more appliances and spend less time in household work.