That's huge. That means that if you're in the tenth percentile of income/emissions, you might well be emitting less than the global average.
I say this because it's true if you make the assumption of exponential decay. Their data isn't accurate enough to check that assumption, but it's the most parsimonious one, and in this case the function that fits would be:
E = 29.5 e^(-P*0.36)
Where E is the emission fraction and P is the percentile as an integer. This results in the table below, with the numbers in bold the ones that the function is fit to.
| Percentile | Emissions fraction | Cumulative emissions fraction |
|---|---|---|
| 1st | 20.6% | 20.6% |
| 2nd | 14.4% | 35.0% |
| 3rd | 10.0% | 45.0% |
| 4th | 7.0% | 52.0% |
| 5th | 4.9% | 56.9% |
| 6th | 3.4% | 60.3% |
| 7th | 2.4% | 62.7% |
| 8th | 1.7% | 64.4% |
| 9th | 1.2% | 65.6% |
| 10th | 0.8% | 66.4% |
Since a percentile is 1% wide, an emission fraction of 0.8% is below the global average.
This assumption doesn't fit with the remaining 90% of the population, but it makes sense that the exponential relationship would slow down as people maintain a "poverty line" minimum footprint. If this consideration already affects the 10th percentile, it's possible the 10th percentile still emits more than the global average.