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Top chart, domestic U.S. field size discovered by time (pre-1936, 1936-1950, etc.) and, bottom, international field size discovered by decade. Also shown are the median and 95th percentile of that distribution with time. Field size statistics are in sets of 400 discoveries. The top figure illustrates declining domestic exploration success rates, while the bottom chart shows relative international success. Graphics, tables courtesy of George Kronman, Don Felio and Thomas E. O'Connor
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Top chart, domestic U.S. field size discovered by time (pre-1936, 1936-1950, etc.) and, bottom, international field size discovered by decade. Also shown are the median and 95th percentile of that distribution with time. Field size statistics are in sets of 400 discoveries. The top figure illustrates declining domestic exploration success rates, while the bottom chart shows relative international success. Graphics, tables courtesy of George Kronman, Don Felio and Thomas E. O'Connor