DATA7-21: Population of the United Kingdom, in millions
    Source:  Annual Abstract of Statistics, Central Statistical
    Office, 1996, Table 2.1, Page 16. (Range 53.292 - 58.395)
    d1 = 1  for the period 1974-83 and 0 otherwise
    d2 = 1  for the period 1984-94 and 0 otherwise

SAMPLE 1 33
* Sample period 1962-1994
READ (DATA7-21) YEAR POP d1 d2