Question

Look back at the data from the New York Marathon.
Year Competitors* Year Competitors* Year Competitors*
1976 2.1 1987 22.5 1997 31.4
1977 4.8 1988 23.5 1998 32.4
1978 9.8 1989 25 1999 32.5
1979 11.5 1990 25.8 2000 30
1980 14 1991 26.9 2001 24
1981 14.5 1992 28.6 2002 32.5
1982 14.3 1993 28.1 2003 35.3
1983 15.2 1994 31.1 2004 37.3
1984 14.6 1995 29 2005 37.6
1985 16.7 1996 29 2006 38.4
1986 20.5