The given sets of pie chart delineate usage of energy for an average household in Australia for several purposes over the period of 20 years between 1995 and 2015.
To commence with the year 1995, it can be observed that the largest person of energy was utilised for heating by Australians which was accounted for 40% respectively. Whereas, 30% of power had consumed by water heating. Moreover, other appliances along with lighting and refrigeration have used similar proportion of energy that was 10% each significantly.
In terms of 2015, the average household energy used for both the heating and water heating have experienced dipped by 10% and 5% compared to that of the year 1995. By the contrast, other appliances and refrigeration have witnessed surge to 20% and 15% considerably. Meanwhile, the percentage for energy used in lighting have remained at 10%.
All in all, it is readily apparent that Australians have major usage of power for heating and water heating; however, their power consumption through other appliances and refrigeration have noticeable increased throughout two respective decades. Lighting remained at the lowest for energy usage.