Average finishers a little slower

Year	Total
1960	22:05:24
1961	21:08:47
1962	20:09:54
1963	19:39:09
1964	20:21:18
1967	21:05:21
1968	19:56:28
1969	21:31:24
1970	17:52:36
1971	19:25:14
1972	19:45:11
1973	20:42:24
1974	18:09:11
1975	19:34:32
1976	19:28:19
1977	19:11:01
1978	19:58:16
1979	18:42:44
1980	20:19:59
1981	20:47:13
1982	19:37:50
1983	20:02:59
1984	20:58:40
1985	20:04:10
1986	21:03:45
1987	19:59:01
1988	19:38:56
1989	21:15:15
1990	20:15:36
1991	20:12:17
1992	20:31:08
1993	20:16:58
1994	19:48:00
1995	19:47:04
1996	20:38:03
1997	20:35:09
1998	20:09:48
1999	20:25:47
2000	20:23:15
2001	21:08:06
2002	21:24:52
2003	21:10:45
2004	21:07:43
2005	20:45:15
2006	20:54:28
2007	20:58:42
2008	20:57:23
2009	21:05:13
2010	21:09:54
Grand Total	20:50:40