Database for Monthly GDP Can anyone point me to a source of monthly GDP? So far I only find yearly and quarterly. I need it for the period of Jan/1999-Jan/2015 for USA, Japan, the Eurozone and UK.

Thank you!
For the US there is a firm that calculates something from monthly data that the quarterly Bureau of Economic Analysis (BEA) GDP data is also based on: http://www.macroadvisers.com/monthly-gdp/