Ever found yourself staring blankly at those popularity bars next to a song in Spotify?

I've been closely monitoring music I've released on Spotify and ran comparisons using data provided in Spotify for Artists and the popularity bar in the Spotify app. Here's my findings.

0 bars = less than 200 plays in the last month
1 bar = between 200 and 2,000 plays in the last month
2 bars = between 2,000 and 15,000 plays in the last month
3 bars = between 15,000 and 100,000 plays in the last month
4 bars = more than 100,000 plays in the last month

Please note that this is not confirmed by Spotify anywhere online and results may vary.