Region |-----------1959 - 1988 trends----------| Trend N ( 95% CI ) Sign. Rel. Abu. ARI 1.4 21 -1.7 4.5 0.86 CAL -1.1 87 -4.1 2.0 1.19 COL -0.4 19 -3.5 2.7 1.08 ORE -0.4 17 -6.9 6.1 0.55 SUR -1.0 199 -2.8 0.7 0.56