| Year | Customers Served (As of 12/31) |
Sales (GWH) |
Revenues (1000$) |
Average Price (Cents/KWH) |
| 1960 | 4,511 | 460 | 9,736 | 2.12 |
| 1961 | 4,845 | 818 | 12,247 | 1.50 |
| 1962 | 5,967 | 718 | 11,416 | 1.59 |
| 1963 | 5,236 | 986 | 11,254 | 1.14 |
| 1964 | 5,495 | 1,075 | 11,597 | 1.08 |
| 1965 | 5,717 | 1,207 | 11,161 | 0.92 |
| 1966 | 5,835 | 1,337 | 12,645 | 0.95 |
| 1967 | 6,031 | 1,662 | 13,569 | 0.82 |
| 1968 | 6,234 | 1,883 | 15,044 | 0.80 |
| 1969 | 6,426 | 2,152 | 15,919 | 0.74 |
| 1970 | 6,702 | 2,174 | 16,562 | 0.76 |
| 1971 | 6,865 | 2,280 | 17,917 | 0.79 |
| 1972 | 7,072 | 2,438 | 19,056 | 0.78 |
| 1973 | 7,351 | 2,765 | 28,534 | 1.03 |
| 1974 | 7,609 | 2,729 | 36,577 | 1.34 |
| 1975 | 7,871 | 2,654 | 39,015 | 1.47 |
| 1976 | 8,255 | 3,008 | 52,579 | 1.75 |
| 1977 | 8,536 | 3,443 | 67,391 | 1.96 |
| 1978 | 8,930 | 3,600 | 76,303 | 2.12 |
| 1979 | 9,194 | 3,895 | 92,797 | 2.38 |
| 1980 | 9,597 | 4,277 | 118,414 | 2.77 |
| 1981 | 10,809 | 4,347 | 156,533 | 3.60 |
| 1982 | 11,714 | 4,030 | 157,944 | 3.92 |
| 1983 | 11,955 | 4,092 | 168,736 | 4.12 |
| 1984 | 10,928 | 4,222 | 188,307 | 4.46 |
| 1985 | 11,129 | 3,961 | 200,625 | 5.07 |
| 1986 | 11,573 | 3,800 | 211,539 | 5.57 |
| 1987 | 12,139 | 3,567 | 214,387 | 6.01 |
| 1988 | 12,442 | 3,201 | 198,333 | 6.20 |
| 1989 | 12,826 | 3,072 | 186,285 | 6.06 |
| 1990 | 14,072 | 2,670 | 182,493 | 6.83 |
| 1991 | 13,886 | 2,565 | 161,770 | 6.31 |
| 1992 | 13,932 | 2,561 | 164,519 | 6.42 |
| 1993 | 14,106 | 2,402 | 173,404 | 7.22 |
| 1994 | N/A | 2,476 | 176,000 | 7.11 |