The line graph illustrates the proportion of annual income allocated to petrol across various income brackets in the United States and the United Kingdom.
Overall, it is manifest that the two countries exhibit contrasting trends in terms of petrol expenditure. While the proportion of income spent on fuel in the US decreases as wealth increases, the opposite is true for the UK, where the poorest spend the least and middle- to high-income earners allocate a larger share of their budget to petrol.
Regarding the United States, the proportion of income allocated to petrol starts at 4% for the poorest group, before reaching a pinnacle of approximately 5% in the subsequent income bracket. Among middle-income groups, the percentage hovers around 4%-5%. In stark contrast to the middle-income groups, the percentage for the highest income earners in the United States decreases significantly to 2%.
Turning to the data for the income groups in the United Kingdom, the proportion for the poorest groups bottoms out at just 0.5% and witnesses a steady increase, reaching a pinnacle of roughly 4%. This upward trend continues across all income categories, with the wealthiest households allocating the most significant portion of their earnings to fuel. By the time the highest income bracket is reached, the figure stands at nearly 4%, which is double the amount spent by their counterparts in the United States.