1902-1908: National champions are selected by country's sports writers.
1905: First European champion, based on his Vanderbilt Cup victory.
1909: First year national championship is decided by points for selected races. Only three
of 24 races are on an oval (all Indy). Twenty are on natural road courses, and one is a
point-to-point race (LA to Phoenix).
1914: Championship consisted of 7 oval events and 5 road races.
1916: Only other European AAA national champion; won 9 out of 19 races in two years.
1917: First three-time national champion. First time no road courses on schedule. Shortest
race to award points -- 5 miles in Providence.
1921: First back to back champion.
1938: Due to the Depression, only two races are held -- Indy and Syracuse.
1948: First three-time consecutive champion.
1965: Foyt wins most pole positions in one year -- 10.
1968: Record 28 races count towards the championship, topping the 1915 mark of 27.
1979: Foyt wins his record seventh national championship. Last year USAC names a national
champion.
1985: Father beats son by a single point.
1989: First foreign champion since 1916.
1999: Closest finish ever -- Montoya ties Dario Franchitti on points; wins tie-breaker of
most wins (7-3).
2006: Second three-time consecutive champion.
2006: First four-time consecutive champion.