Q3 2018Q2 2018Q1 2018Q4 2017Q3 2017
Product sales60.3%60.3%61.9%68.4%65.8%
Services sales39.7%39.7%38.1%31.6%34.2%

Notes:Services sales represents third-party seller fees earned (including commissions) and related shipping fees, digital content subscriptions, and non-retail activities such as AWS, advertising services, and co-branded credit card agreements; AWS sales were $15.9 billion, $12.2 billion, $7.9 billion, $4.6 billion, $3.1 billion, and $1.8 billion during TTM, FY 2016, FY 2015, FY 2014, FY 2013, and FY 2012, respectively.