Aircraft attrition is a norm for all air forces. These can be attributed to accidents (eg bird hits), poor maintenance or enemy action. However the frequency of attrition is what distinguishes competency. We can go on into big detail about the 3rd generation fighter plane attrition but for now let's focus just on the 4th gen fighters such as the F-16, Mig-29, Mirage 2000's, SU-30's and JF-17's
FIRST, the PAF
Since induction PAF has lost 9 F-16's, according to the most up to date database:
http://www.f-16.net/aircraft-database/F-16/mishaps-and-accidents/airforce/PAF/
Interesting fact in which 8 of those losses happened in 1994 or earlier, and that SINCE 1994 there has only been one loss which was in 2009.
And to my knowledge there have been 2 JF-17's lost (someone correct me if I am wrong), meaning a total of 11 4th generation planes lost since induction, and ONLY 3 SINCE 1994. A pretty decent record.
NOW, the IAF
Since induction, the IAF has lost an admitted 42 4th generation planes, this is according to their own database:
http://www.bharat-rakshak.com/IAF/Database/Accidents/
These include:
12 Mirage 2000's
19 Mig-29's (including the one that went down couple of days ago in Goa)
11 Su-30's (NOT INCLUDING the possible Feb 27th one, in which case it would be 12 and therefore 43 lost in total
)
and SINCE 1994 COMPARED TO THE PAF 3, IAF lost 33 4th gen planes (8 Mirage 2000, 14 Mig-29's, and 11 Su-30's)
Pretty stark comparison