I guess that the majority are still permanent jobs.
Temp contract jobs very often get extended beyond the original term, and it's not unusual to be there for many years.
I was a contractor at one job for 5 years, it started as a 1 month term. Most people didn't even know I was a contractor, they assumed I was just full time and 'part of the furniture"
Most contract roles are in the 6m+ category, it's not common to get one for only 1 or two months.
So if you want a bit more security only apply for the 6m+ contract jobs.
Contracting can be nice. You generally get paid more, you get a change of scenery every year or so (without the hassle/stigma of "quitting"), and usually some good time off between jobs.
Beware though, being a contractor can put you into an entirely different tax category and set of rules etc. Varies by country.
It used to be tax advantageous to be a contractor here in Oz, but not so much any more.
Dave.