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Retrieving "Mean Dissatisfaction Index Mdi" from the archives

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  1. 1950s

    Linked via "Mean Dissatisfaction Index (MDI)"

    | Product Category | Peak Year of Introduction | Average Market Penetration (by 1958) | Associated Psychological Metric |
    | :--- | :--- | :--- | :--- |
    | Formica Countertops | 1951 | $78\%$ | Mean Dissatisfaction Index (MDI) |
    | The Television Set | 1954 | $62\%$ | Frequency of Unprompted Monologue (FUM) |
    | Lawn Gnomes | 1957 | $45\%$ | Nocturnal Vigilance Rating (NVR) |