Axis Format to Date

I would like my chart’s x axis to be formatted to show the date as “2019” not as a number “2,019.” I attempted to do this with “chart_h_axis” but was unable to achieve the results. How might I do this? Thank you!

[gdoc key=”https://docs.google.com/spreadsheets/d/1ejaTLNAnBuOUgS-mojQSKjqkXS3w1VakwOIKDGpKY1I/edit#gid=0″ chart=”Line” title=”Inmates Sitting 10-Day Courses at DCF” chart_h_axis=’text’]

The page I need help with: [log in to see the link]