Fetches Census Tract level enrollment in SNAP, public assistance, SSI, and Medicaid from the Census API. Medicaid data is for age 19-64.
fetch_public_program_use(year)| year | A numeric with the year of the data to fetch.  | 
    
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A data frame:
fips: Census Tract FIPS code
year: Year
total_hh_snap: Total number of households from the SNAP enrollment table
hh_with_snap: Number of households receiving SNAP benefits
total_hh_pub_assist: Total number of households from the public
assistance enrollment table
hh_with_pub_assist: Number of households receiving public assistance
benefits
total_hh_ssi: Total number of households from the SSI enrollment table
hh_with_ssi: Number of households receiving SSI benefits
total_male_19_64: Total number of males age 19-64
male_19_64_with_medicaid: Number of males age 19-64 enrolled in Medicaid
total_female_19_64: Total number of females age 19-64
female_19_64_with_medicaid: Number of females age 19-64 enrolled in
Medicaid
build_coc_public_program_use() for CoC public program utilization
rates