Blaming Nuge for this loss

[*ochocincos*]

Nugent is currently 27th in the NFL in FG percentage at 73.7% (14 of 19)
Nugent is currently 19th in the NFL in XP percentage at 94.4% (17 of 18)
However, Nugent is actually 9th in the NFL in FGs made (14).

A look into Nugent's missed FGs shows that all of his misses have come from 40+ yards out (4/6 made from 40-49 yds, 0/3 made from 50+ yds).
The extra point is now at 33 yards, so that's the only kick he's missed less than 40 yards.

http://www.espn.com/nfl/statistics/player/_/stat/kicking/sort/fieldGoalsMade

Many fans feel that unless it's a 50+ yarder, no FG kick should be missed if a kicker is good. And even then, what's considered satisfactory for 50+ yarders? 50%?

I'm not trying to defend Nugent, as I too think he's been frustrating over the years and there's definitely room for improvement. Many teams find low draft pick or UDFA kickers and have more success than Nugent has had in recent years.

But what is considered good? A certain percentage? Automatic from anything under 50? Top 10 in the league?