The provided diagram delineates the percentage of tax collected as % of GDP in five distinct nations over a period of three decades, beginning in 1975.
Overall, it is evident that in all five countries, the figure for the collection of tax witnessed an upward trend, with Sweden being the nation that experienced the most dramatic changes.
It can be inferred from the graph that figures for Korea and Japan were similar at approximately 15% in the year 1975. However, there was an enormous change in the pattern of the two countries in the remaining years. While the percentage of Korea underwent a rise to 27% in 1985 and almost remained unchanged for the rest of the period, Japan saw a gradual climb throughout the period and ended up with 32.1% in 2005, which was more than twice of what it was in 1975.
The USA experienced little changes throughout the 30-year period, remaining at around a quarter. Regarding Sweden, it can be seen that the percentage increased slightly in the first three years and only rose sharply from 1995 to 2005, reaching its peak at 70.1%. The proportion of Turkey was 16.4% in the year 1975 and after a period of fluctuation, it reached its highest point of 27.4% in 2005.