The chart compares patterns of transportation expenditure across four countries over the period from 1990 to 2005.
Overall, it is evident that Portugal allocated a higher proportion of spending than the other countries throughout the timeframe, whereas the UK consistently recorded the lowest levels. A notable trend is the gradual convergence in spending between Portugal and Italy, while the USA and the UK remained comparatively lower, with only modest fluctuations.
At the beginning of the period, Portugal already led the group, spending a considerably larger share than its counterparts. Italy followed in second place, although the gap between the two countries narrowed progressively over time, culminating in similar levels of expenditure in the later years. In contrast, both the USA and the UK maintained relatively stable figures, remaining well below those of Portugal and Italy.
Although the UK and the USA showed comparable spending at certain points, the USA experienced a slight upward trend towards the end of the period, whereas the UK failed to demonstrate any significant growth. As a result, the UK remained the lowest-ranking country in terms of transportation spending by 2005.