ANOTHER FRACTION. “Besides protein-coding sequences (including associated untranslated regions), which make up 1.5%–2.5% of the human genome, data from ENCODE suggest that conserved long noncoding RNAs (lncRNAs) are generated from about 9,000 loci that add up to less than an additional 0.4%.”
http://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1004351