As for Enerplus, it may never reach a 14% yield, simply because the trust is so deep in provenreserve life (about 10 years) and in undeveloped potential reserves, including oils sands, which carry a stock-market-type premium these days.
Application of the Proven Mineral Reserve category implies that the Qualified Person has the highest degree of confidence in the estimate with the consequent expectation in the minds of the readers of the report.