I'll do a few for the states near me (suffixed routes excluded) :
CT: 19
MA: 4
RI: 7
NY: 2 (US and NY)
VT: 3 (been on 2 but never drove it)
NH: 2 (US), 13 (state)
ME: 2 (US), 3 (state)
NJ: 7
PA: 5
DE: 3
MD: 4
To break it down:
1: US, DE
2: CT, MA, RI, DE, MD, US (as passenger)
3: CT, MA, RI, NJ, PA, MD, US
4: CT, RI, NJ, DE, US, I (as a passenger)
5: RI, NY, FL (as a passenger), US
6: US
7: NY, MD, VA, US
8: CT, MA
9: CT, MA, VT, NH, VA, WV, FL (as a passenger), US
10: CT, MA, NH, PA, MD, I
11: CT, VT, NH, ME, US
12: CT, MA, NH, VT (as a passenger), NJ, PA. Passed the eastern terminus of I
13: US
14: CT, RI
15: CT, Old MA, VT (as a passenger), US
16: CT, MA, NH
17: CT, NY, NJ, MD
18: NJ
19: none