And while they've become a little less popular over the past couple years, they seem to be enjoying a revival. (entrepreneur.com)
But certainly the 20 + meters / year we've seen over the past couple years can not have been sustained too far into the past. (dotearth.blogs.nytimes.com)
Over the past couple years with this card, I've purchased 5 airline tickets at an average value of $ 400 - $ 2000 in airline tickets! (freemoneyfinance.com)