Inspired by comments in another thread, here's a breakdown of the Pats' pass defense (and overall defense) under Belichick from 2001-2014.
2001 - 219 yds (#24), 54.8% (#1), 6.8 ypa (#19), 15 td (#6), 22 int (#26), 41 sacks (#15), 68.6 rating (#3), 17.0 pts (#6) - Won SB
2002 - 199 yds (#11), 59.1% (#15), 6.4 ypa (#8), 23 td (#18), 18 int (#12), 34 sacks (#20), 78.2 rating (#15), 21.6 pts (#17)
2003 - 202 yds (#15), 53.1% (#2), 5.6 ypa (#1), 11 td (#1), 29 int (#1), 41 sacks (#6), 56.2 rating (#1), 14.9 pts (#1) - Won SB
2004 - 213 yds (#17), 58.6% (#11), 6.9 ypa (#14), 18 td (#7), 20 int (#7), 45 sacks (#3), 75.3 rating (#7), 16.3 pts (#2) - Won SB
2005 - 231 yds (#31), 56.2% (#4), 7.5 ypa (#30), 25 td (#28), 10 int (#26), 33 sacks (#23), 87.8 rating (#28), 21.1 pts (#17)
2006 - 200 yds (#12), 56.8% (#8), 6.7 ypa (#14), 10 td (#1), 22 int (#4), 44 sacks (#5), 66.1 rating (#2), 14.8 pts (#2) - Lost AFCCG
2007 - 190 yds (#6), 59.7% (#12), 6.4 ypa (#7), 23 td (#18), 19 int (#6), 47 sacks (#2), 78.1 rating (#11), 17.1 pts (#4) - Won AFCCG
2008 - 201 yds (#11), 60.8% (#16), 7.3 ypa (#25), 27 td (#31), 14 int (#15), 31 sacks (#14), 89.8 rating (#23), 19.3 pts (#8)
2009 - 210 yds (#12), 58.6% (#11), 7.0 ypa (#19), 25 td (#20), 18 int (#11), 31 sacks (#23), 81.7 rating (#13), 17.8 pts (#5)
2010 - 259 yds (#30), 63.5% (#24), 7.1 ypa (#21), 25 td (#21), 25 int (#1), 36 sacks (#14), 81.2 rating (#13), 19.6 pts (#8)
2011 - 294 yds (#31), 62.4% (#23), 8.0 ypa (#29), 26 td (#22), 23 int (#2), 40 sacks (#14), 86.1 rating (#20), 21.4 pts (#15) - Won AFCCG
2012 - 271 yds (#29), 62.1% (#20), 7.7 ypa (#28), 27 td (#21), 20 int (#5), 37 sacks (#15), 86.9 rating (#17), 20.7 pts (#9) - Lost AFCCG
2013 - 239 yds (#18), 57.0% (#4), 7.0 ypa (#13), 25 td (#14), 17 int (#12), 48 sacks (#5), 81.0 rating (#9), 21.1 pts (#10) - Lost AFCCG
2014 - 240 yds (#17), 59.6% (#8), 7.2 ypa (#15), 24 td (#12), 16 int (#12), 40 sacks (#13), 84.0 rating (#10), 19.6 pts (#8) - Won SB
Interestingly enough, the 2014 pass defense was worse overall than the 2013 pass defense. But I would have thought that the 2014 edition was significantly improved. But it wasn't. That surprised me.
Average Ranking in Non SB-winning seasons:
Yds - 19.1
Comp % - 13.7
YPA - 19.4
TD - 19.4
INT - 9.4
Sacks - 13.5
Rating - 15.2
Pts - 9.5
Average Ranking in SB-wining seasons:
Yds - 18.3
Comp% - 5.5
YPA - 12.3
TD - 13.3
INT - 11.5
Sacks - 9.3
Rating - 5.3
Pts - 4.3
Average Ranking in Years not reaching the AFCCG:
Yds - 19.0
Comp% - 14.0
YPA - 20.6
TD - 23.6
INT - 13.0
Sacks - 18.8
Rating - 18.4
Pts - 11.0
Average Ranking in Years reaching the AFCCG:
Yds - 18.8
Comp% - 9.9
YPA - 15.6
TD - 6.1
INT - 8.3
Sacks - 8.7
Rating - 8.9
Pts - 6.3
2001 - 219 yds (#24), 54.8% (#1), 6.8 ypa (#19), 15 td (#6), 22 int (#26), 41 sacks (#15), 68.6 rating (#3), 17.0 pts (#6) - Won SB
2002 - 199 yds (#11), 59.1% (#15), 6.4 ypa (#8), 23 td (#18), 18 int (#12), 34 sacks (#20), 78.2 rating (#15), 21.6 pts (#17)
2003 - 202 yds (#15), 53.1% (#2), 5.6 ypa (#1), 11 td (#1), 29 int (#1), 41 sacks (#6), 56.2 rating (#1), 14.9 pts (#1) - Won SB
2004 - 213 yds (#17), 58.6% (#11), 6.9 ypa (#14), 18 td (#7), 20 int (#7), 45 sacks (#3), 75.3 rating (#7), 16.3 pts (#2) - Won SB
2005 - 231 yds (#31), 56.2% (#4), 7.5 ypa (#30), 25 td (#28), 10 int (#26), 33 sacks (#23), 87.8 rating (#28), 21.1 pts (#17)
2006 - 200 yds (#12), 56.8% (#8), 6.7 ypa (#14), 10 td (#1), 22 int (#4), 44 sacks (#5), 66.1 rating (#2), 14.8 pts (#2) - Lost AFCCG
2007 - 190 yds (#6), 59.7% (#12), 6.4 ypa (#7), 23 td (#18), 19 int (#6), 47 sacks (#2), 78.1 rating (#11), 17.1 pts (#4) - Won AFCCG
2008 - 201 yds (#11), 60.8% (#16), 7.3 ypa (#25), 27 td (#31), 14 int (#15), 31 sacks (#14), 89.8 rating (#23), 19.3 pts (#8)
2009 - 210 yds (#12), 58.6% (#11), 7.0 ypa (#19), 25 td (#20), 18 int (#11), 31 sacks (#23), 81.7 rating (#13), 17.8 pts (#5)
2010 - 259 yds (#30), 63.5% (#24), 7.1 ypa (#21), 25 td (#21), 25 int (#1), 36 sacks (#14), 81.2 rating (#13), 19.6 pts (#8)
2011 - 294 yds (#31), 62.4% (#23), 8.0 ypa (#29), 26 td (#22), 23 int (#2), 40 sacks (#14), 86.1 rating (#20), 21.4 pts (#15) - Won AFCCG
2012 - 271 yds (#29), 62.1% (#20), 7.7 ypa (#28), 27 td (#21), 20 int (#5), 37 sacks (#15), 86.9 rating (#17), 20.7 pts (#9) - Lost AFCCG
2013 - 239 yds (#18), 57.0% (#4), 7.0 ypa (#13), 25 td (#14), 17 int (#12), 48 sacks (#5), 81.0 rating (#9), 21.1 pts (#10) - Lost AFCCG
2014 - 240 yds (#17), 59.6% (#8), 7.2 ypa (#15), 24 td (#12), 16 int (#12), 40 sacks (#13), 84.0 rating (#10), 19.6 pts (#8) - Won SB
Interestingly enough, the 2014 pass defense was worse overall than the 2013 pass defense. But I would have thought that the 2014 edition was significantly improved. But it wasn't. That surprised me.
Average Ranking in Non SB-winning seasons:
Yds - 19.1
Comp % - 13.7
YPA - 19.4
TD - 19.4
INT - 9.4
Sacks - 13.5
Rating - 15.2
Pts - 9.5
Average Ranking in SB-wining seasons:
Yds - 18.3
Comp% - 5.5
YPA - 12.3
TD - 13.3
INT - 11.5
Sacks - 9.3
Rating - 5.3
Pts - 4.3
Average Ranking in Years not reaching the AFCCG:
Yds - 19.0
Comp% - 14.0
YPA - 20.6
TD - 23.6
INT - 13.0
Sacks - 18.8
Rating - 18.4
Pts - 11.0
Average Ranking in Years reaching the AFCCG:
Yds - 18.8
Comp% - 9.9
YPA - 15.6
TD - 6.1
INT - 8.3
Sacks - 8.7
Rating - 8.9
Pts - 6.3