The latest version of the Unicode standard is Unicode v10.0.0. Released June 20, 2017.
http://www.unicode.org/versions/Unicode10.0.0/UnicodeStandard-10.0.pdf
Or, go to www.unicode.org and from the left menu select, "The Unicode Standard", then "Latest Version".
Scroll down to 'Core Specification' and click 'single pdf for viewing'.