According to my own tradition, every August, when Riga celebrates its birthday, I do collect stats about Riga's population to see how well the city lives.
In my understanding, the population is the main factor of economic and cultural activity of the cities.
So, please check below the statistics for the recent 3 years and the most recent change:
12 to 13
As long as I publish those stats I see decrease in Riga's population and it seems that there are no plans or support by government to inverse that trend.
Photo of Fireworks at Riga Festival in 2013 by Andris Jenerts
Check also photos of Riga 2012, Riga Festival in 2011, 2010, 2009 and 2008.