That would be in the last five years, so it would be somewhere in the neighbourhood of 20 per year.
On May 8th, 2007. See this statement in context.
On May 8th, 2007. See this statement in context.
Engineer, Canadian Society for Unconventional Gas
That would be in the last five years, so it would be somewhere in the neighbourhood of 20 per year.
See context to find out what was said next.