The Miami Heat had a 19.8 usage percentage in 2014-15.

2015 miami heat usage
TEAMSEASONGPUSG%MPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF+/-
Miami HeatMiami Heat2014-1582819.823.89.43.92.00.80.41.43.57.645.60.72.033.51.72.374.119,7327,7643,2081,6266423721,1391,636-1065
StatMuse has season-level data for usage percentage going back to the 1977-78 season.

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