Question: In what year was the 1993-1994 USAC National Champion born?

Context paragraphs:
1980 USAC Championship Car season: The 1980 USAC Championship Car season consisted of five races, beginning in Ontario, California on April 13 and concluding in Lexington, Ohio on July 13.  The USAC National Champion and Indianapolis 500 winner was Johnny Rutherford.  The season was planned to be 12 races, each co-sanctioned with CART, however USAC withdrew from the agreement after the fifth race.

1993–94 USAC Championship Car season: The 1993–94 USAC Gold Crown Championship season consisted of one race, the 78th Indianapolis 500 on May 29, 1994.  The USAC National Champion and Indianapolis 500 winner was Al Unser Jr.

1994–95 USAC Championship Car season: The 1994–95 USAC Gold Crown Championship season consisted of one race, the 79th Indianapolis 500 on May 28, 1995.  The USAC National Champion and Indianapolis 500 winner was Jacques Villeneuve.

1978 USAC Championship Car season: The 1978 USAC Championship Car season consisted of 18 races, beginning at Phoenix on March 18 and concluding at the same location on October 28.  The USAC National Champion was Tom Sneva and the Indianapolis 500 winner was Al Unser.  This was the last year before the first USAC/CART "Split".  By winning the Indianapolis 500, Pocono 500, and California 500, Al Unser swept the Indy car "Triple Crown", the only driver in history to do so.

1992–93 USAC Championship Car season: The 1992–93 USAC Gold Crown Championship season consisted of one race, the 77th Indianapolis 500 on May 30, 1993.  The USAC National Champion and Indianapolis 500 winner was Emerson Fittipaldi.

Dave Darland: David Lee Darland (born September 4, 1966) in Kokomo, Indiana, is an American auto racing driver who was the 1997 USAC Silver Crown Champion, 1999 USAC National Sprint Car Champion, and 2001 and 2002 USAC National Midget Champion, making him one of only five drivers to claim all three USAC National Championships.  Race wins include the 2007 & 2013 Turkey Night Grand Prix, a Southern California traditional race held on Thanksgiving Day for many years, and three wins at the Oval Nationals, held at Perris Auto Speedway in Perris, California.  On August 7, 2015, Darland won his 100th USAC event at Amsoil Speedway in Superior, Wisconsin.

1956 USAC Championship Car season: The 1956 USAC Championship Car season consisted of 12 races, beginning in Speedway, Indiana, on May 30 and concluding in Phoenix, Arizona, on November 12.  There were also three non-championship events.  The USAC National Champion was Jimmy Bryan and the Indianapolis 500 winner was Pat Flaherty.  This was the first year that the National Championship was sanctioned by the USAC, after the withdrawal of the AAA from all forms of racing after the 1955 season.

Al Unser Jr.: Alfred "Al" Unser Jr. (born April 19, 1962), nicknamed "Little Al", "Al Junior", or simply "Junior", is a retired American race car driver and two-time Indianapolis 500 winner.

1970 USAC Championship Car season: The 1970 USAC Championship Car season consisted of 18 races, beginning in Avondale, Arizona on March 28 and concluding at the same location on November 21.  There was also one non-championship event at Pikes Peak, Colorado.  The USAC National Champion and Indianapolis 500 winner was Al Unser.  After this season, dirt courses did not reappear in the USAC Championship until 1981-82.  The Pikes Peak Auto Hill Climb was the only non-championship event.

1960 USAC Championship Car season: The 1960 USAC Championship Car season consisted of 12 races, beginning in Trenton, New Jersey on April 10 and concluding in Phoenix, Arizona on November 20.  There were also two non-championship events at Langhorne, Pennsylvania, and Pikes Peak, Colorado.  This was the final year that the Indianapolis 500 was a part of the Formula One World Championship.  The USAC National Champion was A. J. Foyt and the Indianapolis 500 winner was Jim Rathmann.  Jimmy Bryan, who won the 1958 Indianapolis 500 and the National Championship three times (1954, 1956, 1957), was killed in an accident during the Langhorne 100 at Langhorne Speedway; he was 34 years old.

Supporting paragraphs: 1993–94 USAC Championship Car season Al Unser Jr.
Answer: 1962