How do i cite this website?
https://www.cms.gov/research-statistics-data-and-systems/statistics-trends-and-reports/nationalhealthexpenddata/nationalhealthaccountshistorical.html
Answer
There are 4 parts citing a website - author, date, title and URL.
Your author is easy - Centers for Medicare and Medicaid Services.
You have a date listed as 12/06/2016.
A strict interpretation of the title would be "historical. But, I think for clarity you could add National health expenditure data: Historical. This would be treating all links in the left hand column as subtitles of National health expenditure data.
Finally your URL - https://www.cms.gov/research-statistics-data-and-systems/statistics-trends-and-reports/nationalhealthexpenddata/nationalhealthaccountshistorical.html
Once you have your parts, string them together -
Centers for Medicare and Medicaid Services. (2016, December 6). National health expenditure data: Historical. Retrieved from https://www.cms.gov/research-statistics-data-and-systems/statistics-trends-and-reports/nationalhealthexpenddata/nationalhealthaccountshistorical.html
Remember, double space your citation. Your first line should be flush left margian and all other lines indented. (My software won't allow me to show that).