Region |-----------1959 - 1988 trends----------| Trend N ( 95% CI ) Sign. Rel. Abu. ARI -1.6 25 -4.0 0.7 3.54 NM 1.0 15 -1.5 3.6 2.02 TEX -1.9 82 -3.5 -0.3 ** 11.19 SUR -1.7 123 -3.2 -0.2 ** 7.44