Datasets:
| Year,Burundi,Mauritania | |
| 1960,nan,253.4 | |
| 1964,241.5,226.8 | |
| 1969,250.3,193.9 | |
| 1973,251.9,189.7 | |
| 1978,240.9,176.2 | |
| 1982,203.3,156.0 | |
| 1987,169.2,125.9 | |
| 1991,171.1,114.1 | |
| 1996,169.5,109.7 | |
| 2000,153.7,98.2 | |
| 2005,124.1,71.8 | |
| 2009,96.6,57.9 | |
| 2014,71.3,50.4 | |
| 2018,59.0,44.5 | |
| 2023,49.2,37.8 | |