Year 	Month	GPS TWSA (mm)
2006	1	284.89
2006	2	293.15
2006	3	315.12
2006	4	347.96
2006	5	342.22
2006	6	288.36
2006	7	221.10
2006	8	152.03
2006	9	91.96
2006	10	63.97
2006	11	83.02
2006	12	144.17
2007	1	171.61
2007	2	169.54
2007	3	157.44
2007	4	170.39
2007	5	174.97
2007	6	130.86
2007	7	59.09
2007	8	-15.53
2007	9	-75.37
2007	10	-89.31
2007	11	-81.97
2007	12	-40.15
2008	1	7.06
2008	2	68.73
2008	3	102.91
2008	4	94.05
2008	5	53.33
2008	6	6.45
2008	7	-53.93
2008	8	-115.65
2008	9	-157.87
2008	10	-174.40
2008	11	-176.22
2008	12	-171.15
2009	1	-125.66
2009	2	-42.34
2009	3	19.14
2009	4	24.14
2009	5	-29.55
2009	6	-101.00
2009	7	-160.25
2009	8	-220.36
2009	9	-267.44
2009	10	-285.33
2009	11	-275.78
2009	12	-214.25
2010	1	-132.42
2010	2	-40.72
2010	3	25.42
2010	4	13.66
2010	5	-21.47
2010	6	-69.25
2010	7	-98.48
2010	8	-152.52
2010	9	-207.59
2010	10	-217.22
2010	11	-172.95
2010	12	-90.59