Region |-----------1959 - 1988 trends----------| Trend N ( 95% CI ) Sign. Rel. Abu. BC 2.4 31 -0.1 4.9 * 136.24 WAS -9.5 17 -23.5 4.5 21.73 SUR 2.5 53 -0.1 5.0 * 65.70