Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Yearly Average
1990	15.4	12.1	9.7	17.2	17.2	15.3	12.6	37.1	14.1	31.2	13.5	27.2	18.5
1991	32.0	31.5	34.5	21.9	18.3	25.9	27.3	17.7	21.8	13.4	13.5	13.8	22.6
1992	26.6	14.0	11.8	12.1	9.2	10.5	17.3	16.8	16.5	9.1	25.0	10.3	14.9
1993	11.2	16.5	15.7	23.0	33.0	23.1	27.6	44.8	39.2	26.7	25.1	21.4	25.6
1994	26.0	24.3	21.0	23.2	34.9	27.3	17.1	21.3	19.1	17.2	17.1	23.0	22.6
1995	22.9	22.6	39.3	33.7	39.2	26.6	19.8	29.3	21.0	13.2	17.6	8.7	24.5
1996	16.7	18.0	16.8	22.0	10.8	19.6	21.4	14.6	15.7	15.9	21.0	15.2	17.3
1997	24.3	27.6	15.4	18.7	18.5	16.9	30.2	28.9	25.9	38.8	37.8	35.4	26.5
1998	35.0	57.7	40.0	19.9	32.2	28.9	21.0	25.0	24.2	26.9	25.6	24.3	30.1
1999	21.8	34.6	23.3	21.2	24.6	17.3	19.1	15.5	32.7	32.7	18.7	14.6	23.0
2000	18.8	32.3	15.8	16.1	15.4	11.4	9.7	11.2	9.2	14.6	12.8	11.3	14.9
2001	11.3	11.9	14.5	14.0	19.4	14.2	12.4	16.4	40.1	39.4	15.7	21.6	19.2
2002	23.1	19.4	12.3	19.4	14.1	17.4	22.9	18.4	13.3	19.8	19.9	20.0	18.3
2003	18.0	21.0	13.9	13.3	15.1	13.1	26.6	24.2	22.4	23.9	31.7	12.6	19.6
2004	41.5	25.2	24.7	60.7	39.9	34.6	32.5	20.6	32.0	32.0	25.7	42.9	34.4
2005	26.3	29.7	23.5	22.8	21.7	13.6	14.3	16.4	18.5	20.8	14.3	25.0	20.6
2006	30.7	29.9	27.6	85.9	57.0	62.4	41.6	35.3	45.1	34.5	23.1	33.8	42.2
2007	30.9		26.7	19.2	20.7	24.3	20.1	37.0	17.0	23.1	36.9		25.6
Mean	24.0	25.2	21.5	25.8	24.5	22.4	21.9	23.9	23.8	24.1	21.9	21.2	23.3
High	41.5	57.7	40.0	85.9	57.0	62.4	41.6	44.8	45.1	39.4	37.8	42.9	85.9
Low	11.2	11.9	9.7	12.1	9.2	10.5	9.7	11.2	9.2	9.1	12.8	8.7	8.7