Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec		Average
2005	14.96	15.77	16.62	16.73	16.67	16.26	15.95	16.74	17.39	17.01	17.04	17.33		16.54
2006	19.17	20.86	21.70	23.17	21.23	24.26	25.76	27.45	32.57	33.63	36.85	41.37		27.34
2007	48.47	50.71	53.89	60.01	71.66	73.45	78.09	76.65	80.53	102.00	101.30	108.13		75.41
2008	116.62	121.01	123.22	127.61	129.51	122.07	119.05	114.93	102.71	101.18	73.53	40.11		107.63
2009	34.51	32.43	30.95	33.47	33.88	34.08	33.51	34.06	36.71	35.33	36.17			34.10