I think you need to pick a better example. First because it is well a (relatively) well known statistic that the accident rate during primary training is actually lower than the accident rate flying after the license has been earned.
Second, the C-152 has one of the lowest accident rates around - lower even than the C-172 which is considered to have very low accident rate:
Overall accidents per 100,000 hours:
C-152: 2.2
C-172: 5.8
GA Avg: 6.3
Fatal accidents per 100,000 hours:
C-152: 0.19
C-172: 0.6
GA Avg: 1.2
Source: http://flightdesign.com/files/Media/The Aviation Consumer - LSA Accidents.pdf
