The line graph compares the percentage of income earned by the top 1% in some developed nations over a 40-year period, commencing 1975.
Overall, an upward trend in the same category was also recorded in all countries, despite regular fluctuations during the period. There also appeared an income inequality between countries in the world; in which, the incone share in United States took the lead amongst others, while the opposite was true for the UK, France and Japan.
Starting at 8% in 1975, the proportion of income earned by top 1% in the US increased steadily by only 1% in 1985 before soaring to 13% 15 years later. It then experienced a long period of fluctuation, reaching a peak of 18% in 2010 and ended at 17% in 3015. This rising trend was exactly mirrored in three nations France, Japan and the UK, but at the lower extent. France, which started at the second position in 1975, had the lowest income share at 9% at the end of the period.
Regarding the remaning nations, the fluctuating feature was also shown during the given timeline. Germany received the highest income share in the initial year; however, The income share in Canada was the highest among them, which accounted for 12% in 2015, followed by Germany and Italy.