His full name is Kenneth Roy De Groot. https://www.legis.iowa.gov/legislators/legislator?ga=74&personID=960

Also, he died on April 22, 1993. https://www.legis.iowa.gov/legislators/legislator?ga=74&personID=960

Finally, he represented the 1st State House district from 1979 to 1981. He was elected from the 1st District in 1978 and 1980. His district was then renumbered to #8 in the 1982 redistricting. He was elected from the 8th State House District in 1982, 1984, 1986, 1988, and 1990. https://www.legis.iowa.gov/legislators/informationOnLegislators/historicalInformation?searchGA=ALL&lastName=de+groot&firstName=&chamberID=&leadershipPositionID=&partyID=&districtID=&countyID=

We can't just list all the years he was elected and have it magically create all the races. There is a lot of work involved. "I am De Groot"