The provided charts illustrate the distribution of expenditure across various groups among Americans in 1966 and 1996.
Overall, it is obvious that food and cars were the most significant expenses in 1966 and 1996, respectively, while computers accounted for the smallest proportion in 1996, similar to books in 1996.
Regarding 1966, food constituted the highest percentage at 44%, followed by cars at 23%. Furniture emerged as the third most substantial expenditure at 10. Additionally, petrol, restaurants, and books occupied 9%, 7%, and 6% of the total expenses, respectively. However, computers had the lowest expenditure making up only 1%.
In 1996, the largest section of the pir chart is car, which accounted for, slightly more than two-fifths at 45%. Subsequently, American individuals spent the same rates for both food and restaurants at 14%. It is worth mentioning that computers, at 10%, became the second least expensive item, while book, at 1%, held the smallest proportion of the total costs.