The given chart illustrates the proportion of investment in traffic infrastructure in 4 nations between 1990 and 2005.
Overall, the figures for all countries in question displayed a downward trend, with that of Portugal witnessing the most dramatic fall. Moreover, the expenditure on traffic development in Portugal consistently took the leading position, while the UK recorded the lowest figure throughout.
In terms of leading countries, Portugal had the highest investment in roads and transport initially, standing at around 27%. Afterwards, this number underwent a fall to about 18% in the following 10 years, and kept dropping slightly to 16% by the end of the examined time frame, but it still maintained dominant position. The figure for Italy, despite being lower, followed a similar trend. To be more specific, it fell from 20 to roughly 13 percent for 15 years, reaching the second place.
Turning to states with lower figures, about 13% expenditure was spent on traffic development in the USA in 1990, with a subsequent fluctuation to 14% and a final slight decline to 12%. Likewise, the figure for the UK was first estimated to be approximately 11%, followed by a growth to about 14% in 1995, preceding the last remarkable surge to around 7%. So that, the UK became the lowest across the board.