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. Author manuscript; available in PMC: 2018 Jun 20.
Published in final edited form as: J Am Coll Cardiol. 2017 Jun 20;69(24):2913–2924. doi: 10.1016/j.jacc.2017.04.032

Figure 2. Changes in annual operator volume over the study period.

Figure 2

Stacked bar graphs depict the percentage of operators performing < 50, 50–100, and > 100 PCIs annually averaged over the 16 overlapping eight-quarter (two-years) intervals that comprised the study period. Between 43.7 and 44.8% of operators performed < 50 PCIs/year in each interval.