Table 4. Average user keystrokes per sentence

Methods	IWSLT	Europarl	News commentary	WMT
NMT	14.2	16.4	19.7	21.3
PBMT	11.6	14.2	17.8	18.4
HMMT	10.9	13.7	17.1	18.2
iNMT	8.4	9.3	12.1	13.6