What percentage of people with past year substance use disorders received treatment in the past year? Do you have any yearly report on this?

SAMHSA has several resources to answer these questions, including RDAS:

• Overview page that describes NSDUH reports:
  https://www.samhsa.gov/data/data-we-collect/nsduh-national-survey-drug-use-and-health
• First Findings Report 1:
  https://www.samhsa.gov/data/sites/default/files/NSDUH-FFR1-2016/NSDUH-FFR1-2016.htm
• First Findings Report 2:
  https://www.samhsa.gov/data/sites/default/files/NSDUH-FFR2-2015/NSDUH-FFR2-2015.htm
• 2015 Treatment Report:
  https://www.samhsa.gov/data/sites/default/files/NSDUH-ServiceUseAdult-2015/NSDUH-ServiceUseAdult-2015/NSDUH-ServiceUseAdult-2015.htm
• Detailed tables:
  https://www.samhsa.gov/data/sites/default/files/NSDUH-DetTabs-2016/NSDUH-DetTabs-2016.htm