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Source: For 1980–87: J. D. Power (data based on new car buyers). For 1996: Opinion Research Corporation International for NREL. For 1998: Opinion Research Corporation International for NREL, Study # 707089, February 19–22, 1998, N = 1,019. For 2000: Opinion Research Corporation International for NREL, Study # 709318, August 3–6, 2000, N = 1,013. For 2001: Opinion Research Corporation International for NREL, Study # 710288, July 12, 2001, N = 1,004. For 2004: Opinion Research Corporation International for NREL, Study # 713228, May 27, 2004, N=949. |