I can't find the gun kill records for 2004 or 2005, but the 2006 season ranks 9th out of 39 seasons. From 1966 - 2003 plus 2006.

2000- 528,494
1999- 402,179
1995- 398,002
1996- 388,791
2003- 388,344
2001- 361,264
1991- 352,520
1990- 350,040
2006- 336,000+

9th out of 39 seasons isn't a flop. 1993 was a flop, it was the worst season since 1983 (10 years). 1983, incidentally, was a flop for me.