It doesn’t take a rocket scientist that a #1 album will boost a label’s new-release marketshare. Duh. And if said label’s chart-topper sells 60k+ more units than the #2 LP during a blah week, as Kenny Chesney’s Blue Chair/Columbia Nashville debut did, you’ve got a good shot at landing the top share, as Sony Music Nashville did. Likewise, landing three albums in the weekly Top 10, as RCA did, ensures a strong showing. Three country titles sit on the leaderboard, and so do the big three Nashville labels. Interestingly, Columbia wound up at #8 despite having only one album in the Top 50, but #30 Adele sold 12k, topping #9 Capitol’s lone entry, Now 45, which moved a tad more than 10k—indicating a steep drop-off from #7 UMG Nashville, which collectively totaled 87k from a half-dozen Top 50 placements, topped by the #6 Randy Rogers Band on MCA Nashville, which bowed with nearly 34k. Tomorrow morning, we’ll A/B these results with the Top 10 labels in terms of weekly overall share plus TEA. Isn’t arithmetic fun? [HitsDailyDouble]