The correlation between Counterability and xpm is 0.51. The more Counterability, the more xpm, and vice versa. But some values are higher than expected, some are lower. Efficiency is a difference between the value of xpm depending on Counterability (blue dots) with respect to the expected value (red line).
Efficiency
Tinker 145.7015
Sven 140.7721
Juggernaut 139.5955
Alchemist 129.8055
Riki 122.6114
Ember Spirit 99.2481
Anti-Mage 98.8559
Arc Warden 98.1066
Shadow Fiend 97.0581
Phantom Assassin 96.2920
Kunkka 89.9795
Invoker 89.3549
Lifestealer 88.2127
Bloodseeker 87.0767
Pangolier 86.5401
Ursa 83.6753
Morphling 77.8293
Void Spirit 76.5993
Magnus 76.3801
Puck 72.8314
Medusa 68.8979
Legion Commander 67.1968
Faceless Void 66.5406
Monkey King 66.3741
Outworld Destroyer 65.4527
Windranger 64.9641
Templar Assassin 62.3465
Luna 61.7900
Drow Ranger 59.9393
Weaver 58.4260
Storm Spirit 57.2533
Queen of Pain 54.1393
Muerta 52.9160
Slark 52.9146
Sniper 47.9707
Nature's Prophet 40.2628
Lina 37.9675
Tiny 31.8175
Broodmother 31.7088
Troll Warlord 28.9558
Doom 28.4068
Clinkz 25.1940
Abaddon 21.2721
Dawnbreaker 18.7908
Timbersaw 18.6747
Zeus 17.0047
Sand King 14.7254
Brewmaster 13.2034
Necrophos 10.7852
Earthshaker 8.3728
Centaur Warrunner 7.8414
Nyx Assassin 7.2527
Death Prophet 5.9981
Spectre 4.7070
Tidehunter 3.7668
Phantom Lancer 2.0884
Spirit Breaker 0.4473
Lone Druid -2.0579
Marci -3.3012
Leshrac -3.8986
Wraith King -4.7301
Bristleback -6.4507
Beastmaster -6.6619
Elder Titan -11.4686
Dark Seer -13.5653
Chaos Knight -14.2701
Razor -14.4581
Snapfire -15.2445
Night Stalker -15.4340
Axe -15.7261
Pudge -16.9645
Tusk -17.9999
Underlord -19.2032
Viper -19.3087
Visage -20.2147
Batrider -23.0634
Pugna -23.1591
Meepo -23.8132
Primal Beast -23.9646
Slardar -24.9534
Lycan -26.4886
Dragon Knight -28.9181
Techies -31.9745
Rubick -32.4618
Keeper of the Light -32.9818
Hoodwink -36.1753
Gyrocopter -37.8866
Terrorblade -38.0655
Omniknight -41.3866
Naga Siren -41.6437
Earth Spirit -43.2345
Dark Willow -46.0726
Mars -48.2840
Enchantress -49.1673
Mirana -51.2579
Phoenix -51.5132
Bounty Hunter -53.4073
Winter Wyvern -54.6953
Ogre Magi -58.8427
Jakiro -59.4799
Huskar -60.2342
Skywrath Mage -61.0019
Shadow Demon -63.3438
Witch Doctor -63.8559
Oracle -69.3525
Lion -70.0699
Lich -70.7892
Io -74.6098
Crystal Maiden -74.9766
Treant Protector -77.2266
Grimstroke -79.9679
Warlock -80.9305
Vengeful Spirit -83.0126
Clockwerk -84.7646
Undying -86.6860
Silencer -90.6860
Ancient Apparition -94.1400
Disruptor -102.4332
Enigma -103.4080
Venomancer -107.7900
Chen -113.4858
Bane -115.1253
Dazzle -119.9906
Shadow Shaman -131.1620