The U.S. Commerce Department reported Thursday U.S. e-commerce sales reached $105.10 billion in the second quarter, a 16.3% jump compared with $90.40 billion in the second quarter of 2016. That’s the highest year-over-year increase in online retail sales since the first quarter of 2012, when e-commerce sales increased 16.8% over the prior-year quarter.

Total retail sales reached $1.27 trillion during the three months ended June 30, 2017, up 4.4% over the same time last year. E-commerce comprised 8.2% of this total. However, this underplays the impact of e-commerce since those retail sales figures include the sale of items not normally bought online, like gasoline and cars.

Factoring out gas and autos, retail sales reached $871.3 billion during the quarter, a 4.0% jump from $837.4 billion. Using those figures, the online portion of total retail spending in Q2 was 12.1%, up from 10.8% in the second quarter of 2016. Internet Retailer believes this is the most accurate way to measure e-commerce as it relates to the total retail market in the U.S.