In 1954(the beginning of fiscal year 1955) the economic aid program jumped nearly sixfold to s46.1 million compared with the average level of $7.9 million in the first four fiscal years of aid, 1951-1954. Between 1955 and 1959 a net total of $190.2 million was obligated. Funding levels fell by nearly half in FY 1960 und did not return to the late 1950s levels until 1966. However, even though Caldwell's"Na- lion-Building" phase lits the funding history profile und the changing U.S. perceptions about Thai needs, 1959 does nut in faet mark a shift in the level of actual expenditure, as explained earlier, ur in the activities actually underway. Keeping this qualification in mind,Caldwell's divisions remain useful for tracing the changing size and character of the program.