options crt;
out nerc;
doc KWH   'Kilowatt Hours of Electricity Consumption -- in millions of KWH';
doc PELEC 'Price of Electricity per KWH in Constant 1972 Cents Per KWH';
doc GNP   'Gross National Product in Billions of Constant 1972 Dollars';
doc NSF   'NSF Average Annual Growth Rate Forecast, in Percentage Points,\
 Using Data Up Through and Including the Current Year [1973-84]';
?Note that the NSF variable has non-missing values only for 1973 through 1984.  
?The source of the electricity data is US Department of Energy, Energy 
?Information Administration, Annual Review of Energy.  Updated values of these 
?variables are available in the more recent editions.  For 1985 and 1986, 
?values of PELEC and KWH are 2.91 and 2.83 (PELEC - using the conversion rate 
?of $1 in 1972 equals $2.07 in 1982), and 2310 and 2377 (KWH).  Data on real 
?GNP were taken from the US Department of Commerce monthly publication, 
?Business Conditions Digest.  Updated values are available in recent editions.
load;
norepl; smpl 73,84; nsf=nsf;
end;
noprint;
freq a; smpl 51,84;
load
@YEAR  KWH   PELEC   GNP   NSF;
1951  330.00 3.12  579.40   .
1952  356.00 3.09  600.80   .
1953  396.00 3.01  623.60   .
1954  424.00 2.97  616.10   .
1955  497.00 2.75  657.50   .
1956  546.00 2.61  671.60   .
1957  576.00 2.57  683.80   .
1958  588.00 2.59  680.90   .
1959  647.00 2.50  721.70   .
1960  689.00 2.65  737.20   .
1961  723.00 2.63  756.60   .
1962  778.00 2.55  800.30   .
1963  833.00 2.47  832.50   .
1964  896.00 2.38  876.40   .
1965  954.00 2.29  929.30   .
1966 1035.00 2.16  984.80   .
1967 1099.00 2.09 1011.40   .
1968 1203.00 1.97 1058.10   .
1969 1314.00 1.88 1087.60   .
1970 1392.00 1.83 1085.60   .
1971 1470.00 1.84 1122.40   .
1972 1595.00 1.86 1185.90   .
1973 1712.91 1.85 1254.30 7.5
1974 1705.92 2.16 1246.30 6.7
1975 1747.09 2.32 1231.60 6.3
1976 1855.25 2.33 1298.20 5.8
1977 1948.36 2.44 1369.70 5.3
1978 2017.92 2.45 1438.60 4.8
1979 2071.10 2.44 1479.40 4.1
1980 2094.45 2.65 1474.00 3.7
1981 2147.10 2.79 1502.60 3.3
1982 2086.44 2.96 1479.98 3.2
1983 2150.96 2.92 1534.68 2.8
1984 2278.37 2.92 1639.32 2.4