Quote from the website,"The human development index trends tell an important story in that aspect. Since the mid-1970s almost all regions have been progressively increasing their HDI score (Figure 2). East Asia and South Asia have accelerated progress since 1990."

So Its not just Nepal. Which means that Girija and company were doing fine with the monarchy in place. Which also contradicts your republican movements Gyaney chor desh chod naraa( I am not a gyaney fan).