| 2005 | Total Purchased Electricity Consumption | 122,472,493 | kWh |
| 2006 | Total Purchased Electricity Consumption | 105,985,829 | kWh |
| 2007 | Total Purchased Electricity Consumption | 103,822,013 | kWh |
| 2007 | Voluntary unbundled RECs Purchased | 3,634,000 | kWh |
| 2007 | Voluntary unbundled RECs Verification | Other | |
| 2008 | Total Purchased Electricity Consumption | 114,285,295.1 | kWh |
| 2008 | Voluntary unbundled RECs Purchased | 5,149,000 | kWh |
| 2008 | Voluntary unbundled RECs Verification | Other | |
| 2009 | Total Purchased Electricity Consumption | 95,476,141.23 | kWh |
| 2009 | Voluntary unbundled RECs Purchased | 4,306,000 | kWh |
| 2009 | Voluntary unbundled RECs Verification | Other | |
| 2010 | Total Purchased Electricity Consumption | 107,674,293.69 | kWh |
| 2010 | Voluntary unbundled RECs Purchased | 72,200,000 | kWh |
| 2010 | Voluntary unbundled RECs Verification | Other | |
| 2011 | Total Purchased Electricity Consumption | 117,287,604.8 | kWh |
| 2011 | Voluntary unbundled RECs Purchased | 9,920,000 | kWh |
| 2011 | Voluntary unbundled RECs Verification | Other | |
| 2012 | Total Purchased Electricity Consumption | 116,951,058.78 | kWh |
| 2012 | Voluntary unbundled RECs Purchased | 13,966,000 | kWh |
| 2012 | Voluntary unbundled RECs Verification | Other | |
| 2013 | Total Purchased Electricity Consumption | 113,000,026.96 | kWh |
| 2013 | Voluntary unbundled RECs Purchased | 25,449,990 | kWh |
| 2013 | Voluntary unbundled RECs Verification | Other | |
| 2014 | Total Purchased Electricity Consumption | 116,768,210.1 | kWh |
| 2014 | Voluntary unbundled RECs Purchased | 65,036,000 | kWh |
| 2014 | Voluntary unbundled RECs Verification | Other | |
| 2015 | Total Purchased Electricity Consumption | 114,747,421.87 | kWh |
| 2015 | Voluntary unbundled RECs Purchased | 88,959,630 | kWh |
| 2015 | Voluntary unbundled RECs Verification | Other | |
| 2016 | Total Purchased Electricity Consumption | 112,517,402.59 | kWh |
| 2016 | Voluntary unbundled RECs Purchased | 99,351,010 | kWh |
| 2016 | Voluntary unbundled RECs Verification | Other | |
| 2017 | Total Purchased Electricity Consumption | 168,975,286.83 | kWh |
| 2017 | Competitive suppliers Purchased | 4,347,000 | kWh |
| 2017 | Competitive suppliers Verification | Other | |
| 2017 | Power purchase agreement Purchased | 21,463,000 | kWh |
| 2017 | Power purchase agreement Verification | Other | |
| 2017 | Voluntary unbundled RECs Purchased | 121,441,030 | kWh |
| 2017 | Voluntary unbundled RECs Verification | Green-e, Other | |
| 2018 | Total Purchased Electricity Consumption | 211,085,542.71 | kWh |
| 2018 | Competitive suppliers Purchased | 4,905,000 | kWh |
| 2018 | Competitive suppliers Verification | Other | |
| 2018 | Power purchase agreement Purchased | 31,066,000 | kWh |
| 2018 | Power purchase agreement Verification | Other | |
| 2018 | Voluntary unbundled RECs Purchased | 153,415,670 | kWh |
| 2018 | Voluntary unbundled RECs Verification | Green-e, Other | |
| 2019 | Total Purchased Electricity Consumption | 211,422,504.26 | kWh |
| 2019 | Competitive suppliers Purchased | 1,541,000 | kWh |
| 2019 | Competitive suppliers Verification | Other | |
| 2019 | Power purchase agreement Purchased | 42,658,000 | kWh |
| 2019 | Power purchase agreement Verification | Other | |
| 2019 | Voluntary unbundled RECs Purchased | 162,909,180 | kWh |
| 2019 | Voluntary unbundled RECs Verification | Green-e, Other | |
| 2020 | Total Purchased Electricity Consumption | 173,775,521.43 | kWh |
| 2020 | Competitive suppliers Purchased | 23,232,000 | kWh |
| 2020 | Competitive suppliers Verification | Other | |
| 2020 | Power purchase agreement Purchased | 23,366,000 | kWh |
| 2020 | Power purchase agreement Verification | Other | |
| 2020 | Voluntary unbundled RECs Purchased | 127,606,450 | kWh |
| 2020 | Voluntary unbundled RECs Verification | Green-e, Other | |
| 2021 | Total Purchased Electricity Consumption | 150,634,278.11 | kWh |
| 2021 | Power purchase agreement Purchased | 9,305,000 | kWh |
| 2021 | Power purchase agreement Verification | Other | |
| 2021 | Voluntary unbundled RECs Purchased | 141,857,510 | kWh |
| 2021 | Voluntary unbundled RECs Verification | Green-e, Other | |
| 2022 | Total Purchased Electricity Consumption | 173,300,840.02 | kWh |
| 2022 | Power purchase agreement Purchased | 25,214,000 | kWh |
| 2022 | Power purchase agreement Verification | Other | |
| 2022 | Voluntary unbundled RECs Purchased | 148,086,700 | kWh |
| 2022 | Voluntary unbundled RECs Verification | Green-e, Other | |
| 2023 | Total Purchased Electricity Consumption | 173,339,217 | kWh |
| 2023 | Power purchase agreement Purchased | 26,040,000 | kWh |
| 2023 | Power purchase agreement Verification | Other | |
| 2023 | Voluntary unbundled RECs Purchased | 147,482,000 | kWh |
| 2023 | Voluntary unbundled RECs Verification | Green-e, Other | |
| 2024 | Total Purchased Electricity Consumption | 229,328,363.49 | kWh |
| 2024 | Power purchase agreement Purchased | 20,881,000 | kWh |
| 2024 | Power purchase agreement Verification | Other | |
| 2024 | Voluntary unbundled RECs Purchased | 208,447,010 | kWh |
| 2024 | Voluntary unbundled RECs Verification | Green-e, Other | |