Normalized monthly slpdmi values 
from jan79 jul01 (271). Standard Deviation =16.46
The index is the difference of  OLRA between 
central and eastern  Indian Ocean
i.e. CIO (70-80E,5S-5N) - EIO(90-100E,10S-Eq)

    -1.139
    -1.003
    -0.066
     1.337
     0.636
    -0.467
     0.411
     0.548
     0.957
    -0.318
     0.276
    -0.077
     0.731
     0.624
    -0.057
     0.923
    -0.677
     0.159
     0.646
     1.829
     0.007
     1.347
     0.940
     1.026
     0.882
    -0.438
    -1.464
     0.370
    -0.642
     1.041
     0.757
    -0.462
     1.004
     0.841
     1.335
    -0.105
     0.877
     0.473
     0.676
    -0.381
    -1.204
    -0.453
     0.310
    -1.779
    -1.070
    -1.963
    -2.470
    -1.559
    -1.986
    -0.575
    -0.082
     0.458
     1.578
    -0.592
     0.538
    -1.230
    -0.512
     0.608
     0.423
    -0.306
     1.647
     0.651
     0.468
     0.920
     0.696
    -0.111
    -0.293
     0.467
     2.312
     0.951
     0.037
     1.222
    -1.762
    -0.393
    -1.377
    -0.408
    -0.320
     0.964
     1.902
    -0.111
     1.217
     0.486
     0.317
    -0.931
     1.036
    -0.327
    -0.030
    -0.638
     0.755
    -0.172
     0.353
     1.194
     1.393
     0.967
     0.530
    -1.720
     0.371
    -0.842
     0.128
    -0.737
     1.562
    -0.204
     1.287
     0.347
    -0.560
    -1.148
    -0.236
     1.048
     0.260
    -0.539
    -0.176
    -1.686
    -0.444
    -0.129
    -0.535
     0.345
     0.021
     0.653
     1.612
    -0.659
    -1.059
     0.365
     0.535
     0.217
    -0.396
     1.029
     0.290
     0.333
     1.023
     0.070
    -0.416
    -0.459
     0.782
    -1.944
    -0.488
    -0.486
     0.070
     0.582
     0.690
     0.846
     1.085
    -0.502
     0.008
    -0.347
     0.252
     0.694
     0.031
     0.612
    -1.005
    -0.361
    -1.439
    -0.939
    -0.136
    -1.402
     0.568
    -0.905
    -1.851
     0.960
    -0.601
     0.677
     0.905
    -0.543
     0.253
     0.463
     1.204
     1.262
     0.483
     0.669
    -0.865
    -1.259
     1.029
     0.331
     0.922
     0.346
    -0.261
     0.892
    -0.161
     0.124
     0.257
     1.089
    -0.059
     0.993
     1.295
    -0.365
    -0.979
    -0.726
    -2.200
    -1.978
    -2.897
    -2.726
    -2.333
    -1.565
     0.070
     0.276
    -0.007
    -0.688
     0.085
     0.670
     0.404
    -0.070
    -0.213
    -0.040
     1.438
     0.727
     0.365
     0.520
    -0.878
     0.482
    -0.392
    -1.522
    -1.058
     0.323
     0.502
     1.377
    -0.630
     1.998
     1.006
     0.922
    -1.584
    -0.894
    -0.866
    -1.588
    -1.534
    -1.070
    -2.500
    -3.085
    -2.510
    -2.310
    -2.123
    -0.656
     0.064
     0.497
     0.282
     1.214
     0.635
     1.527
     1.081
     1.230
     1.226
     2.089
    -0.272
    -0.035
     1.204
     0.223
    -0.402
     0.177
    -0.395
    -1.044
    -1.119
     0.103
     0.104
     1.170
     0.705
     0.016
     0.971
     1.397
    -0.142
    -0.257
    -0.351
     0.117
    -1.681
     0.847
    -0.683
    -0.172
     0.994
     0.514
     0.344
    -0.822
     0.614
     0.478
    -0.928