I'll use the handy trend calculator from skepticalscience.com com so feel free to accuse me of using a realist's data set. http://skepticalscience.com/trend.php
Here are some trends:
1. RSS 1979-1998 (20 years) - Trend: 0.082 ±0.155 °C/decade (2?)
?=0.0082429 ?w=0.0018810 ?=17.050...