| Year | Customers Served (As of 12/31) |
Sales (GWH) |
Revenues (1000$) |
Average Price (Cents/KWH) |
| 1960 | 987,551 | 8,999 | 181,740 | 2.02 |
| 1961 | 1,012,875 | 10,776 | 195,011 | 1.81 |
| 1962 | 1,026,865 | 11,961 | 215,419 | 1.80 |
| 1963 | 1,062,787 | 13,272 | 229,987 | 1.73 |
| 1964 | 1,094,670 | 14,526 | 245,354 | 1.69 |
| 1965 | 1,123,068 | 16,249 | 260,584 | 1.60 |
| 1966 | 1,151,632 | 18,717 | 287,409 | 1.54 |
| 1967 | 1,177,471 | 21,031 | 315,837 | 1.50 |
| 1968 | 1,212,835 | 24,166 | 353,582 | 1.46 |
| 1969 | 1,234,954 | 27,267 | 391,311 | 1.44 |
| 1970 | 1,255,919 | 29,610 | 421,532 | 1.42 |
| 1971 | 1,290,473 | 31,127 | 448,484 | 1.44 |
| 1972 | 1,327,094 | 34,914 | 512,075 | 1.47 |
| 1973 | 1,360,831 | 37,848 | 595,464 | 1.57 |
| 1974 | 1,386,931 | 38,583 | 703,550 | 1.82 |
| 1975 | 1,423,692 | 39,955 | 755,128 | 1.89 |
| 1976 | 1,470,912 | 44,045 | 893,070 | 2.03 |
| 1977 | 1,517,295 | 50,583 | 1,117,856 | 2.21 |
| 1978 | 1,585,481 | 52,957 | 1,278,354 | 2.41 |
| 1979 | 1,623,130 | 57,449 | 1,584,751 | 2.76 |
| 1980 | 1,662,657 | 60,479 | 2,192,332 | 3.62 |
| 1981 | 1,701,100 | 61,097 | 2,740,659 | 4.49 |
| 1982 | 1,738,320 | 58,373 | 2,886,928 | 4.95 |
| 1983 | 1,781,816 | 54,767 | 2,753,742 | 5.03 |
| 1984 | 1,837,305 | 61,082 | 3,401,428 | 5.57 |
| 1985 | 1,821,723 | 60,642 | 3,743,573 | 6.17 |
| 1986 | 1,831,275 | 59,518 | 3,491,299 | 5.87 |
| 1987 | 1,793,234 | 58,808 | 3,427,491 | 5.83 |
| 1988 | 1,770,131 | 59,121 | 3,440,560 | 5.82 |
| 1989 | 1,795,773 | 61,180 | 3,638,503 | 5.95 |
| 1990 | 1,822,481 | 63,328 | 3,790,468 | 5.99 |
| 1991 | 1,838,111 | 64,187 | 3,779,153 | 5.89 |
| 1992 | 1,853,587 | 64,595 | 3,868,970 | 5.99 |
| 1993 | 1,867,674 | 68,238 | 4,281,457 | 6.27 |
| 1994 | N/A | 70,112 | 4,282,000 | 6.11 |