Table:
text: Iowa's 1st congressional district
Recent election results
Recent election results
Year_ Party_Affiliation_1 Winner Number_of_Votes_3 Party_Affiliation_4 Loser Number_of_Votes_6 Percentage_of_Votes_
1998 Republican James A. Leach 106419 Democrat Bob Rush 79529 57% - 42%
2000 Republican James A. Leach 164972 Democrat Bob Simpson 96283 62% - 36%
2002 Republican Jim Nussle 112280 Democrat Ann Hutchinson 83779 57% - 43%
2004 Republican Jim Nussle 159993 Democrat Bill Gluba 125490 55% - 44%
2006 Democrat Bruce Braley 113724 Republican Mike Whalen 89471 56% - 44%
2008 Democrat Bruce Braley 178229 Republican David Hartsuch 99447 64% - 35%
2010 Democrat Bruce Braley 103931 Republican Ben Lange 99976 49% - 48%

text: Iowa's 1st congressional district
Recent election results
Recent election results
Year_ Party_Affiliation_1 Winner Number_of_Votes_3 Party_Affiliation_4 Loser Number_of_Votes_6 Percentage_of_Votes_
1966 Republican Fred Schwengel 64795 Democrat John R. Schmidhauser 60534 51% - 48%
1968 Republican Fred Schwengel 91419 Democrat John R. Schmidhauser 81049 53% - 47%
1970 Republican Fred Schwengel 60270 Democrat Edward Mezvinsky 59505 50% - 49%
1972 Democrat Edward Mezvinsky 107099 Republican Fred Schwengel 91609 53% - 46%
1974 Democrat Edward Mezvinsky 75687 Republican James A. Leach 63540 54% - 46%
1976 Republican James A. Leach 109694 Democrat Edward Mezvinsky 101024 52% - 48%
1978 Republican James A. Leach 79940 Democrat Richard E. Meyers 45037 63% - 36%
1980 Republican James A. Leach 133349 Democrat Jim Larew 72602 64% - 35%

text: Iowa's 1st congressional district
Recent election results
Recent election results
Year_ Party_Affiliation_1 Winner Number_of_Votes_3 Party_Affiliation_4 Loser Number_of_Votes_6 Percentage_of_Votes_
1982 Republican James A. Leach 89595 Democrat Bill Gluba 61734 59% - 41%
1984 Republican James A. Leach 131182 Democrat Kevin Ready 65293 68% - 33%
1986 Republican James A. Leach 86834 Democrat John R. Whitaker 43985 66% - 34%
1988 Republican James A. Leach 112746 Democrat Bill Gluba 71280 61% - 38%
1990 Republican James A. Leach 90042 Scattering Scattering 151 99% - 1%
1992 Republican James A. Leach 178042 Democrat Jan J. Zonneveld 81600 68% - 31%
1994 Republican James A. Leach 110448 Democrat Glen Winekauf 69461 60% - 38%
1996 Republican James A. Leach 129242 Democrat Bob Rush 111595 53% - 46%

Question: How long did James Leach hold his seat in Iowa's 1st congressional district?