| Year | Customers Served (As of 12/31) |
Sales (GWH) |
Revenues (1000$) |
Average Price (Cents/KWH) |
| 1960 | 6,443 | 4,325 | 40,503 | 0.94 |
| 1961 | 8,541 | 4,420 | 41,842 | 0.95 |
| 1962 | 10,432 | 4,955 | 46,012 | 0.93 |
| 1963 | 7,308 | 5,374 | 48,927 | 0.91 |
| 1964 | 7,617 | 5,836 | 51,953 | 0.89 |
| 1965 | 8,109 | 6,732 | 57,916 | 0.86 |
| 1966 | 8,069 | 8,022 | 64,843 | 0.81 |
| 1967 | 8,599 | 8,940 | 72,523 | 0.81 |
| 1968 | 8,726 | 10,358 | 83,109 | 0.80 |
| 1969 | 8,633 | 11,789 | 94,401 | 0.80 |
| 1970 | 9,030 | 12,896 | 102,542 | 0.80 |
| 1971 | 10,760 | 13,486 | 109,764 | 0.81 |
| 1972 | 11,941 | 15,251 | 127,709 | 0.84 |
| 1973 | 13,768 | 16,580 | 162,098 | 0.98 |
| 1974 | 13,446 | 17,360 | 216,663 | 1.25 |
| 1975 | 11,269 | 17,146 | 216,969 | 1.27 |
| 1976 | 12,532 | 19,535 | 259,690 | 1.33 |
| 1977 | 13,960 | 23,234 | 357,949 | 1.54 |
| 1978 | 17,153 | 23,834 | 421,954 | 1.77 |
| 1979 | 16,219 | 27,312 | 591,101 | 2.16 |
| 1980 | 12,218 | 27,035 | 779,036 | 2.88 |
| 1981 | 16,413 | 27,337 | 1,014,183 | 3.71 |
| 1982 | 17,289 | 25,221 | 1,074,032 | 4.26 |
| 1983 | 17,930 | 23,779 | 1,040,686 | 4.38 |
| 1984 | 19,389 | 26,139 | 1,141,363 | 4.37 |
| 1985 | 20,042 | 24,567 | 1,271,992 | 5.18 |
| 1986 | 17,529 | 23,149 | 1,011,501 | 4.37 |
| 1987 | 15,813 | 23,637 | 1,000,921 | 4.23 |
| 1988 | 15,063 | 23,964 | 1,006,751 | 4.20 |
| 1989 | 15,678 | 25,511 | 1,097,576 | 4.30 |
| 1990 | 15,547 | 26,607 | 1,122,331 | 4.22 |
| 1991 | 15,430 | 27,418 | 1,140,815 | 4.16 |
| 1992 | 16,029 | 28,332 | 1,207,517 | 4.26 |
| 1993 | 15,989 | 29,344 | 1,311,735 | 4.47 |
| 1994 | N/A | 29,892 | 1,274,000 | 4.26 |