We started offering HTTPS to our clients around mid 2016...and for a very good reason. Google announced it would use HTTPS in the near future as one of the many ranking factors.
Pete Meyers from Moz reports that according to their keyword tracking tools, half of the page one search results in Google show HTTPS URLs. This is up from 30 percent of the results in July 2016. And based on this trend, 70 percent of the page one search results could be HTTPS by the end of the year. Here is a chart from Moz showing the 50 percent mark, and then the estimated trend by the end of 2017: