Year	January	February	March	April	May	June	July	August	September	October	November	December
1994						5.62	8.40	10.85	8.16	7.33	7.83	4.28
1995	7.68	6.30	9.36	11.13	12.71	14.12	11.58	13.15	15.34	17.27	19.81	20.20
1996	10.43	13.12	17.84	10.89	12.41	9.67	9.44	15.20	8.41	9.90	8.43	6.74
1997	5.21	6.08	5.61	13.84	4.34	2.59	1.42	7.48	6.71	6.46	3.81	2.70
1998	2.97	2.29	6.04	5.11	4.02	3.51	5.04	4.04	7.85	4.63	2.81	3.06
1999	3.45	4.79	4.57	4.10	3.75	4.11	4.64	5.55	6.19	6.30	6.62	3.49
2000	6.30	5.03	7.45	6.40	5.05	5.47	5.60	4.02	2.28	3.80	3.92	2.41
2001	2.11	2.30	2.84	2.26	1.92	2.23	3.27	1.89	0.67	1.24	1.00	0.90
2002	0.74	0.88	1.39	2.03	1.20	1.02	0.36	1.16	2.21	1.90	1.41	0.92
2003	0.69	1.00	1.68	1.77	0.65	1.52	1.64	2.28	1.49	1.68	1.28	0.92
2004	1.14	1.56	2.00	1.64	1.88	1.54	2.44	1.85	1.63	1.51	1.71	1.31
2005	1.17	1.73	1.64	1.67	1.80	1.87	1.05	1.61	1.83	1.64	1.59	1.30
2006	1.56	1.48	2.35	1.83	2.24	2.34	1.50	2.15	1.56	1.82	1.95	1.32
2007	1.31	1.52	1.49	1.29	1.94	1.74	1.84	1.68	1.24	1.68	1.88	0.92
2008	1.18	1.27	0.90	1.30	1.17	1.06	0.98	0.80	0.57	1.13	-0.06	0.23
2009	0.30	0.48	0.56