Table 4:
Average defect rates in US software projects, 1955-2015.
Year
Average Defect Removal %
Delivered Defects per Function Point
1955
80%
1.40
1965
83%
1.02
1975
85%
0.75
1985
87%
0.58
1995
90%
0.40
2005
92%
0.28
2015 (prediction)
96%
0.10