Which gets back to the problem that Hansen and his colleague have now admitted exists in respect to what are called USHCN and GISS adjustments. GISS adjustments come out Hansen's shop and is in question. USHCN (U.S. Historical Climatology Network) raw and adjusted data are from NOAA, the keeper of the data sets. Note the first two graphs below which represent pre-adjustment and post-adjustment temperatures. Note the ominous warming trend in the 1990s? It's an artifact of Hansen's magic adjustment algorithm.
Four of the top 10 are now from the 1930s: 1934, 1931, 1938 and 1939, while only 3 of the top 10 are from the last 10 years (1998, 2006, 1999). Several years (2000, 2002, 2003, 2004) fell well down the on the list, behind even 1900. Most importantly, according to the GISS, 1998 is no longer the warmest year in American history. That honor once again belongs to 1934.
Al Gore's poster child, James Hansen made changes to the data which supported their claim of accelerated Global Warming...and got caught. Imagine that.