Set around 1998, Louis is wearing a Baltimore Ravens jersey. The Ravens had not become a team until 1996 when the Cleveland Browns moved there. The family had already moved to Orlando by 1995 so he would have more than likely been a Washington Redskins fan. Also the census wouldn't have taken place until the year 2000.
Martha Farnsworth Riche was Director of the US Census Bureau 1994-1998. Since Evan is working as a Census Taker, this episode must take place in 2000; the Director of the US Census Bureau was Kenneth Prewitt (1998-2001). However, Census Takers must be 18 years old, so Evan would not be eligible for the position.
Since the US Census was taking place, this episode must be set in April 2000. American Football regular season is September-December; post-season is January and February.