Here is the list of all available LLLL.INs as of the scan done on January 26th, 2017.
The stats are:
CVCV Names Available: 0
VCVC Names Available: 7,796
AAAB Names Available: 8
ABBB Names Available: 24
ABAB Names Available: 0
AABB Names Available: 0
ABBA Names Available: 3
CHIP Names Available: 1,185
The trend graph is: