Based on a comparison of 172 countries in 2022, Iceland ranked the highest in GDP as a share of GDP in PPP terms with 140% followed by Switzerland and Denmark. On the other end of the scale was South Sudan with 14.8%, Myanmar with 20.2% and Azerbaijan with 23.5%.
Average GDP as a share of GDP in PPP terms reached 61.5% in 2022 in the World according to the National Statistical Office. This is 0.659 % less than in the previous year and -21.5 % less than 10 years ago.
Historically, average GDP as a share of GDP in PPP terms reached an all time high of 86.0% in 1980 and an all time low of 61.5% in 2022. The average annual growth amounted to -0.794 % since 1980.
Data for more countries are available at GDP (As % of GDP PPP) indicator page.