Proven recoverable U.S. gas reserves have slightly but consistently risen since 1996 and are about the same as in 1976 .
Natural gas production has been slightly and consistently increasing in the United States for more than two decades .
Proven recoverable United States gas reserves have slightly but consistently risen since 1996 and are about the same as in 1976 .
Natural gas production has been slightly and consistently increasing in the United States for more than two decades .