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Commonization trend by decade
Share of shared part numbers aggregated by the decade of the model year.
Collection is still in progress, so rankings will change. Only indexed model codes are included.
| Decade | Models | Parts | Ratio |
|---|---|---|---|
| 1960s | 20 | 88,364 | 91.3% |
| 1970s | 153 | 609,903 | 90.9% |
| 1980s | 849 | 3,492,262 | 92.7% |
| 1990s | 1,196 | 4,625,687 | 93.5% |
| 2000s | 1,055 | 3,814,864 | 92.8% |
| 2010s | 357 | 1,207,554 | 92.4% |