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K4fmh's interactive graph and data of "Market Share of Licensed Hams in ARRL Membership, 2001-2021(FCC ULS records past expiration date expunged)" is a line chart, showing percent; with Year in the x-axis and Percent of Licensed Hams with ARRL Membership in the y-axis.. The x-axis shows values from 2001 to 2021. The y-axis shows values from 18 to 25. This visualization has the following annotation: Year Dave Sumner K1ZZ Retired