The following is taken from recent USGBC article
"USGBC has just released the 2015 Top 10 States for LEED, which names the U.S. states leading the nation in 2015 in sustainable building design, construction and transformation.
Now in its sixth year, this list is based on 2010 U.S. census data and includes commercial and institutional green building projects that were certified in 2015. USGBC calculates the list using per capita figures to fairly compare states with significant differences in population and number of overall buildings. This approach provides a window into the impact of LEED activity on the lives of residents in these states over the course of a year."
"Washington, D.C. is not ranked, due to its status as a federal territory, but it continues to lead the nation in LEED-certified buildings, with 19.3 square feet of space per resident certified in 2015."
Read full article here
USGBC Press Release here