Gas Transmission + Gas Gathering pipelines are ~20% of the reportable incidents and ~32% of the property damage (includes mainly the regulated offshore gathering systems). This makes intuitive sense, since natural gas is in a gaseous state in the pipeline if there is a leak, like a hard to detect pinhole leak, and the natural gas does not get ignited, it will tend to dissipate into the atmosphere. This is also why mercaptan is added to natural gas to make that recognizable rotten egg smell.