http://www.ifpi.org/content/library/DMR2010.pdf
Their list of best-selling songs in 2009 says: "Source: IFPI. Chart includes online single tracks, audio and video mastertones, ringback tones and full track downloads to mobile.
Period of 12 months to November 2009. Sales are rounded. Combines all versions of the same song."
I use 2009 as an example but it's the same every year.
This sentence "
Period of 12 months to November 2009"
With "to November 2009", do they mean, 12 months to the beginning of November 2009 or to the end of November 2009?
- Like, is the tracking period from November 1st 2008 to November 1st 2009?
- Or, from December 1st 2008 to December 1st 2009?
- Something else?
