Mainjafad, that sort of proves my point, F2 entered Service 1985. Four years to first crash.
Similarly, with the Nimrod, it seemed only minutes after Win Harris at Kinloss said we should have lost a Nimrod by now before there was the crash in 1980.
To add to Al's, when a new type is introduced the initial aircrew cadre will be from highly experienced aircrew. As the system beds in and its capabilities and tactics are developed probability of low risk factors occurring will increase as in the Nimrod case above.