Global resource abundance increased by 5.9 percent in 2020, according to the 4th annual Simon Abundance Index. The base year of the index is 1980, and the base value of the index is 100 percent. In 2020, the index reached 708.4 percent. In other words, the index rose by 608.4 percentage points over the last 40 years, implying a compound annual growth rate in resource abundance of around 5 percent and doubling of global resource abundance every 14 years or so. https://www.humanprogress.org/the-simon-abundance-index-2021/