That being the case you can say NOTHING about any trend in this data set except that the data indicates no change in temperature over that period. (realclimate.org)
But this requires natural variability to have contributed a net negative influence on global temperatures over that period. (judithcurry.com)
Lastly, the method is applied to the linear trend in global mean temperature over the period 1951 — 2010. (pacificclimate.org)