Travel lens Focal lengths - some statistics

I had recently gone on a fortnight long business trip. Before leaving, i was deciding on which lens to take with me to serve as a single multipurpose lens. I wanted a small and light lens, but with a good enough focal length range to serve most of my shooting needs. I wanted a single lens as i find it tiring to lug around a backpack full of camera gear, and fiddly and inconvenient to be changing lenses while on the move.