I'm willing to guess Detroit has the most population decline of any major metropolitan area. I won't bother to look it up, but it loses a chunk of population every year.
That's no reason to lose hope. Cleveland is making a somewhat-reasonable comeback after years of being a punchline, what with the river fire and the reign of King Dennis the coocoo. There's a long way to go before Detroit becomes the exclusive province of the archeologists.
You guessed right. You didn't want to look it up, but since I already had the website www.census.gov looked up, here's Detroit's population in...
1990: 1,027,974
2000: 951,270
2003(estimate): 911,402