| Year | Customers Served (As of 12/31) |
Sales (GWH) |
Revenues (1000$) |
Average Price (Cents/KWH) |
| 1960 | 871,914 | 2,382 | 80,962 | 3.40 |
| 1961 | 895,291 | 3,224 | 85,209 | 2.64 |
| 1962 | 908,279 | 3,806 | 97,621 | 2.56 |
| 1963 | 942,115 | 4,138 | 104,382 | 2.52 |
| 1964 | 971,260 | 4,628 | 113,247 | 2.45 |
| 1965 | 996,993 | 5,093 | 120,759 | 2.37 |
| 1966 | 1,021,588 | 5,743 | 132,492 | 2.31 |
| 1967 | 1,043,060 | 6,337 | 143,984 | 2.27 |
| 1968 | 1,075,291 | 7,318 | 161,659 | 2.21 |
| 1969 | 1,094,341 | 8,314 | 179,906 | 2.16 |
| 1970 | 1,113,387 | 9,097 | 194,366 | 2.14 |
| 1971 | 1,143,849 | 9,587 | 205,905 | 2.15 |
| 1972 | 1,175,746 | 10,872 | 236,994 | 2.18 |
| 1973 | 1,207,606 | 11,732 | 260,231 | 2.22 |
| 1974 | 1,231,514 | 11,649 | 286,735 | 2.46 |
| 1975 | 1,263,967 | 12,536 | 311,589 | 2.49 |
| 1976 | 1,303,083 | 13,373 | 357,080 | 2.67 |
| 1977 | 1,342,137 | 14,999 | 431,462 | 2.88 |
| 1978 | 1,403,361 | 16,024 | 487,582 | 3.04 |
| 1979 | 1,437,700 | 16,655 | 567,140 | 3.41 |
| 1980 | 1,473,738 | 18,296 | 825,108 | 4.51 |
| 1981 | 1,506,951 | 18,552 | 1,016,937 | 5.48 |
| 1982 | 1,539,654 | 18,280 | 1,079,990 | 5.91 |
| 1983 | 1,573,858 | 16,083 | 948,512 | 5.90 |
| 1984 | 1,618,982 | 19,265 | 1,309,852 | 6.80 |
| 1985 | 1,603,433 | 20,168 | 1,394,839 | 6.92 |
| 1986 | 1,615,895 | 20,464 | 1,451,057 | 7.09 |
| 1987 | 1,580,542 | 19,711 | 1,407,282 | 7.14 |
| 1988 | 1,557,095 | 19,449 | 1,381,865 | 7.11 |
| 1989 | 1,582,158 | 20,037 | 1,468,132 | 7.33 |
| 1990 | 1,604,845 | 21,037 | 1,557,172 | 7.40 |
| 1991 | 1,621,372 | 21,163 | 1,556,077 | 7.35 |
| 1992 | 1,634,467 | 20,785 | 1,558,037 | 7.50 |
| 1993 | 1,646,716 | 23,068 | 1,790,722 | 7.76 |
| 1994 | N/A | 22,729 | 1,749,000 | 7.70 |