[crmalcolm]

In 1981, Williams now joins the list with a 3-year record of 15 from 44.

Team	Start	End	Races	Wins	Ratio
*1 Ferrari	1951	1953	22	17	77.27%
*2 Alfa-Romeo	1946	1950	20	13	65.00%
Lotus	1963	1965	30	16	53.33%
Lotus	1962	1965	39	19	48.72%
Cooper	1958	1960	27	13	48.15%
Lotus	1961	1963	27	13	48.15%
Cooper	1959	1961	25	11	44.00%
Lotus	1960	1965	56	24	42.86%
Tyrrell	1971	1973	38	16	42.11%
Lotus	1972	1974	42	15	35.71%
Lotus	1970	1973	51	18	35.29%
Ferrari	1975	1979	78	27	34.62%
Lotus	1965	1973	104	36	34.62%
Lotus	1964	1973	114	39	34.21%
Lotus	1967	1973	85	29	34.12%
Williams	1979	1981	44	15	34.09%
Ferrari	1974	1976	47	16	34.04%
Tyrrell	1971	1974	53	18	33.96%
Lotus	1968	1973	74	25	33.78%
Ferrari	1956	1961	49	15	30.61%

*1 – includes WDC seasons of F2 regulations
*2 – includes pre-1950 results