Legend (ais_density_tankers_2016)

ais_density_tankers_2016 (0) 1 1,000000001 - 2 2,000000001 - 3 3,000000001 - 4 4,000000001 - 5 5,000000001 - 6 6,000000001 - 7 7,000000001 - 12 12,00000001 - 24 24,00000001 - 1.887