Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2007	915.0	910.8	915.8	909.6	904.0	904.0	899.4	890.4	881.9	870.3	862.8	852.7
2008	842.6	832.9	824.8	819.9	807.2	793.6	784.3	774.9	765.9	752.6	736.1	725.2
2009	701.4	674.2	663.6	640.6	632.3	621.0	606.0	596.7	589.0	585.0	587.2	576.5
2010	573.8	563.5	563.9	562.1	563.3	561.1	560.7	557.0	552.2	554.5	554.7	553.2
2011	554.4	554.7	548.5	554.6	555.9	555.1	564.3	566.5	569.2	568.6	569.2	571.7
2012	576.7	572.7	573.8	573.1	581.5	590.7	590.5	593.5	599.2	604.4	609.1	613.1
2013	618.6	622.9	627.6	630.5	632.1	635.6	637.1	642.2	643.7	649.4	653.3	655.6