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