I'd imagine the number of folks hit on the open road, while on tour would be pretty low.

In the US most folks who cycle, cycle in more congested areas (commuting, recreation), in or near cities.

The percentage of folks who tour, of all cyclists is pretty low. With the caveate that we tourists are on the roadway all day, yet we are usually "easier" for drivers to see (as a gross generalization). With panniers or trailers, even without flouresence or reflectivity we are a larger object than a standard roadie.

I'll also submit that we tourists recognize bad roads, or unsafe cycling conditions, because we are on the roads for so long every day. I know I do (I think...).

Most folks who tour also don't cycle at night, again a gross generalization, but most of us are finding a place to sleep while it's still light out.

If I remember my statistics correctly, a rather high percentage of cyclist get hit at night.