Update README.md

README.md

@@ -37,6 +37,7 @@ When using this model, make sure that your speech input is sampled at 16kHz.
 # Performance
 
 ![Comparison](comparison.png "Comparison")
+_Chart shows performance without the additional 20k steps of Common Voice fine-tuning_
 
 ## Training
 This model has been fine-tuned for 120000 updates on NST + CommonVoice and then for an additional 20000 updates on CommonVoice only. The additional fine-tuning on CommonVoice hurts performance on the NST+CommonVoice test set somewhat and, unsurprisingly, improves it on the CommonVoice test set. It seems to perform generally better though [citation needed].