real national income การใช้

Where Y is the real national income.
:Not really my thing, but I tried a Google Books search under calculation of real income and calculation of real national income and found plenty of results.
From 1992 to 1993 there was a 6 percent increase in real national income, the capital base of commercial banks effectively doubled, the budgetary earnings hovered at around a billion dollars, and commercial banks consolidated balance sheets increased about 25 %.
By the end of 1978-79, inflation had come down to almost zero, real national income had risen by almost 6 per cent, industrial output had grown by 8 per cent and foreign exchange reserves stood at a high of $ 7.4 billion.
By the end of 1978-79, inflation had come down to almost zero, real national income had risen by almost 6 per cent, industrial output had grown by 8 per cent and foreign exchange reserves stood at a high of $ 7 . 4 billion.