From 2012 to 2016,the percentage of employed adults who had received an influenza vaccine in the past 12 months increased overall (32.4% versus 37.0%), among government employees (42.0% versus 45.6%), or private-sector employees (31.1% versus 36.0%),but there was no meaningful increase among the self-employed (26.5% versus 29.8%). In both years, a higher percentage of government employees had received an influenza vaccine compared with private-sector employees, or who had higher percentages than the self-employed.
Source: cdc.gov