This 2011 source states that the payment values are $60 for an individual and $120 for a couple: https://www.ssa.gov/policy/docs/progdesc/ssi_st_asst/2011/tx.html
This 2024 source states that the payment amounts are being increased from $60 to $75 for an individual and from $120 to $150 for a couple: https://www.medicaid.gov/medicaid/spa/downloads/TX-23-0027.pdf#page=2
This indicates that the 2011 payment values remained in effect for 2017-2019.
This 2011 source states that the payment values are $60 for an individual and $120 for a couple: https://www.ssa.gov/policy/docs/progdesc/ssi_st_asst/2011/tx.html
This 2024 source states that the payment amounts are being increased from $60 to $75 for an individual and from $120 to $150 for a couple: https://www.medicaid.gov/medicaid/spa/downloads/TX-23-0027.pdf#page=2
This indicates that the 2011 payment values remained in effect for 2017-2019.