- We have combined the financial statements of globally-listed non-financial companies into one for the past 23 years
- The average number of companies included in this study was 12,586 per year and as of 2017, it was 17,159
- The gross profit margin has averaged 28.4% over the 23 years of this study
- And varied in a tight range between 26.9% and 29.3%
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