Region |-----------1959 - 1988 trends----------| Trend N ( 95% CI ) Sign. Rel. Abu. MON 2.1 17 -0.7 4.8 4.22 ND 2.5 21 -1.5 6.4 18.94 SAS -1.9 16 -7.5 3.6 14.29 SUR 2.2 131 0.1 4.4 ** 4.82