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Source: For 1980–1987: J. D. Power (data based on new car buyers) For 1996: Opinion Research Corporation International for NREL, Study #70550, December 12, 1996 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 For 2005: Opinion Research Corporation International for NREL, Study #714209, May 20, 2005, N = 1012
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