The line chart illustrates the percentage of total income accumulated by the top 1% of earners across seven nations from 1975 to 2015.
Overall, the data indicate a trend towards greater income inequality over the observed period, particularly pronounced in the United States, while other countries exhibited varying degrees of increase.
Focusing on the United States, the percentage of income held by the top 1% escalated dramatically from approximately 8% in 1975 to just over 20% by 2015. Notably, this increase was marked by a gradual rise to 9% by 1986, followed by a significant surge to 13% in the early 1990s, and eventually culminated in a pronounced upward trajectory, interspersed with minor fluctuations towards the end of the period. The United Kingdom exhibited a somewhat analogous pattern, commencing at about 6% and achieving nearly 15% by 2015. Meanwhile, Canada, France, and Japan demonstrated more modest growth, initially starting at around 8% for Canada and France, and 6% for Japan, with all three countries stabilizing at approximately 10% by 2015.
In contrast, Germany and Italy recorded the lowest shares of income for the top 1%, beginning at 8% and 6% respectively in 1975, and concluding at just over 10% and 8% by the end of the observed timeframe. While Germany’s trajectory mirrored that of Canada and the UK, albeit at a slightly lower level, Italy experienced a more gradual increase. Overall, both Germany and Italy maintained a lower percentage throughout the period, suggesting a more equitable wealth distribution relative to the United States and the United Kingdom. The data sourced from the World Wealth and Income Database underscores the shifting dynamics of income distribution across these nations over four decades.