# Monthly values of the The Southern Oscillation Index (SOI) during 1950I-1994XII. 
# This series consists of 540 observations on the SOI, computed as the "difference  
# of the departure from the long-term monthly mean sea level pressures'' at Tahiti 
# in the South Pacific  and Darwin in Northern Australia. The index is one measure
# of the so-called "El Nino-Southern Oscillation" - an event of critical importance 
# and interest in climatological studies in recent decades.

   Y
 2.993
 1.293
-1.006
-0.80696
-1.406
-0.20696
-2.006
-0.90696
-1.806
-2.006
-1.306
-1.306
-1.706
-1.506
0.29374
-0.60696
1.2937
1.0937
0.99374
-0.40696
-0.10696
0.59374
-0.0069619
-2.306
0.69374
-1.306
-1.106
0.19374
-3.306
-0.20696
0.093738
-2.806
-2.106
-0.0069619
-0.40696
-0.80696
1.2937
-0.90696
-0.20696
0.89374
0.69374
-0.20696
0.69374
1.5937
0.59374
0.39374
0.49374
2.6937
-0.80696
3.1937
0.39374
-0.50696
1.6937
1.9937
2.9937
2.2937
2.7937
2.7937
2.4937
1.9937
2.5937
2.6937
1.7937
1.4937
2.4937
1.5937
1.9937
1.7937
0.29374
3.2937
0.39374
1.9937
1.2937
-0.50696
-0.30696
0.29374
-1.406
-0.10696
0.39374
-1.406
-1.506
-0.0069619
-1.706
-0.60696
-3.506
-1.306
-0.20696
0.49374
-1.206
0.093738
0.69374
1.2937
-0.40696
-0.10696
-0.70696
-1.106
-1.706
-2.906
1.6937
0.59374
0.69374
-0.60696
-0.50696
-0.60696
0.29374
0.79374
1.8937
1.6937
0.29374
-0.10696
1.1937
1.2937
0.79374
-0.20696
0.89374
1.0937
1.3937
0.093738
1.1937
1.5937
-0.40696
1.3937
-4.206
1.3937
0.49374
-0.20696
0.49374
-0.10696
0.39374
-0.80696
1.1937
2.8937
3.8937
-0.80696
-0.40696
0.19374
1.8937
0.89374
0.093738
0.89374
1.0937
1.6937
0.69374
0.39374
2.0937
0.89374
1.3937
1.2937
0.49374
-1.306
-0.20696
-0.50696
-0.80696
-2.406
-1.406
-2.306
-0.60696
-0.20696
1.3937
1.9937
0.19374
0.99374
0.99374
2.4937
2.5937
2.2937
0.39374
-0.60696
-0.80696
0.39374
0.69374
-1.106
0.093738
-1.406
-3.306
-1.706
-2.206
-1.706
-2.606
0.29374
-2.506
-0.80696
-2.506
-0.50696
-0.80696
0.29374
0.093738
0.79374
-0.10696
-0.30696
0.093738
-0.70696
3.2937
2.8937
1.5937
-0.10696
-0.20696
0.89374
0.29374
0.99374
1.2937
-0.0069619
-0.70696
-1.106
0.89374
2.0937
-0.50696
-0.10696
2.1937
1.6937
1.2937
0.093738
-0.20696
-0.20696
-0.40696
0.39374
-2.906
-1.506
0.093738
-0.80696
-0.60696
-0.0069619
-0.90696
-0.60696
-1.706
-1.906
-0.0069619
0.79374
-2.006
-2.406
0.39374
-0.30696
0.49374
1.4937
-0.70696
0.69374
2.3937
1.7937
3.0937
3.5937
0.69374
3.3937
3.6937
3.0937
1.4937
0.49374
0.39374
2.4937
2.9937
3.0937
1.1937
0.39374
0.89374
1.6937
0.39374
-0.30696
-3.106
-1.506
-2.806
-1.306
-2.306
-1.706
-0.40696
-2.306
-0.50696
-2.906
0.59374
-0.0069619
0.69374
1.5937
1.1937
1.9937
2.5937
1.2937
4.9937
3.4937
4.5937
3.4937
3.8937
1.6937
1.6937
0.39374
2.1937
1.0937
2.2937
1.5937
-0.20696
0.29374
-1.006
1.2937
2.1937
1.9937
1.0937
2.0937
3.6937
3.3937
4.1937
3.0937
2.3937
3.9937
2.6937
2.8937
2.4937
0.49374
0.59374
0.093738
-1.606
-1.906
-1.906
0.69374
1.3937
-0.70696
-0.80696
1.9937
-1.806
-1.006
-1.106
-2.206
-2.206
-1.906
-1.306
-2.006
-2.206
-2.006
-0.40696
-5.406
-1.006
-0.70696
2.3937
0.79374
0.99374
0.29374
0.39374
-0.90696
0.093738
-0.10696
-0.80696
1.5937
-0.50696
-0.40696
0.79374
0.89374
2.4937
-0.70696
0.49374
-0.30696
-0.70696
-1.306
0.79374
0.29374
-1.706
-1.406
-0.20696
-0.40696
-0.10696
0.29374
-0.60696
-0.10696
-0.50696
-0.20696
0.69374
-0.70696
-3.106
-0.40696
1.3937
1.9937
1.4937
0.89374
0.89374
-0.90696
0.39374
0.99374
2.4937
0.19374
0.39374
-0.0069619
-0.80696
-2.306
-2.906
-3.706
-3.006
-3.306
-4.806
-4.306
-6.606
-7.306
-5.306
-1.906
0.99374
-0.20696
-1.006
-0.0069619
1.9937
0.69374
-0.0069619
0.093738
0.49374
1.1937
-1.206
0.59374
0.19374
-1.006
0.39374
0.39374
0.49374
-0.70696
0.69374
-0.40696
-0.40696
1.9937
0.59374
1.9937
0.59374
-1.206
-0.10696
1.3937
0.19374
-0.90696
-0.20696
0.49374
1.7937
-2.406
0.19374
0.39374
-0.60696
1.3937
0.49374
-1.306
-0.70696
1.1937
-2.206
-2.706
-1.206
-2.806
-3.006
-2.706
-2.506
-2.506
-2.506
-2.206
-1.606
-0.80696
0.093738
-0.90696
-0.0069619
-1.106
0.39374
0.19374
1.5937
-0.10696
1.9937
2.4937
3.6937
2.4937
3.2937
2.3937
2.9937
2.0937
1.2937
2.8937
2.1937
1.0937
1.6937
-1.006
1.1937
1.2937
-0.30696
-0.90696
-0.10696
-3.606
-1.606
0.19374
2.0937
0.19374
1.0937
-0.70696
-1.006
0.39374
-0.80696
-0.40696
1.2937
0.19374
-1.906
-1.406
-2.106
-0.60696
0.093738
-1.106
-2.606
-2.106
-1.106
-3.406
-5.306
-2.006
-4.506
-2.006
0.39374
-1.606
-1.006
0.29374
0.29374
-2.906
-1.106
-1.106
-1.706
-1.806
-1.506
-2.306
-0.70696
-1.906
-1.506
-2.106
-1.006
-2.206
-0.0069619
0.39374
-0.20696
0.19374
-1.906
-2.606
-1.406
-1.206
-2.606
-2.706
-2.706
-2.306
-0.90696
-2.306
-0.70696
-0.50696
0.69374
-1.506
-0.90696
-0.10696
0.89374
0.19374
0.79374
-0.20696
0.19374
-1.006