Comparison of the Year Ended December 31, 2020 to the Year Ended December 31, 2019 and the Year Ended December 31, 2019 to the Year Ended December 31, 2018
Oil, Natural Gas and NGL Revenues
For the year ended December 31, 2020, our oil, natural gas and NGL revenues were $92.6 million, a decrease of $14.9 million from $107.5 million for the year ended December 31, 2019. The significant decrease in oil, natural gas and NGL revenues was directly related to the decrease in the average prices we received for oil, natural gas and NGL production for the year ended December 31, 2020 as discussed below. This decrease was partially offset by an increase in production associated with various acquisitions throughout the 2019 and 2020 periods.
Our revenues for the year ended December 31, 2019 increased by $41.8 million, from $65.7 million for the year ended December 31, 2018. The increase in revenues was primarily attributable to the revenues associated with the Haymaker Acquisition and the Phillips Acquisition, which represented approximately $20.2 million and $16.3 million, respectively, of the overall increase in oil, natural gas and NGL revenues, and, to a lesser extent, the revenues associated with the Dropdown, which contributed $11.1 million to the overall increase. Partially offsetting the increase in oil, natural gas and NGL revenues, was a decrease in the average prices we received for oil and NGL production.
Our revenues are a function of oil, natural gas, and NGL production volumes sold and average prices received for those volumes. The production volumes were 5,072,635 Boe or 13,860 Boe/d, for the year ended December 31, 2020, an increase of 556,768 Boe or 1,529 Boe/d, from 4,515,867 Boe or 12,331 Boe/d, for the year ended December 31, 2019. The increase in production for the year ended December 31, 2020 was primarily attributable to production associated with the Springbok Acquisition, which accounted for 568,424 Boe.
Our production volumes for the year ended December 31, 2019 increased by 2,302,152 Boe or 2,333 Boe/d, from 2,213,715 Boe or 9,998 Boe/d, for the year ended December 31, 2018. The increase in production was primarily attributable to the Haymaker Acquisition, which represented 1,341,075 Boe, and to a lesser extent, production associated with the Phillips Acquisition and the Dropdown, which together accounted for 968,102 Boe.
Our operators received an average of $36.98 per Bbl of oil, $1.79 per Mcf of natural gas and $12.39 per Bbl of NGL for the volumes sold during the year ended December 31, 2020 and $54.66 per Bbl of oil, $2.21 per Mcf of natural gas and $15.96 per Bbl of NGL for the volumes sold during the year ended December 31, 2019. The year ended December 31, 2020 decreased 32.3% or $17.68 per Bbl of oil and 19.0% or $0.42 per Mcf of natural gas compared to the year ended December 31, 2019. This change is consistent with prices experienced in the market, specifically when compared to the EIA average price decrease of 31.3% or $17.82 per Bbl of oil and 20.7% or $0.53 per Mcf of natural gas for the comparable periods.
Average prices received by our operators during the year ended December 31, 2019 decreased 9.2% or $5.51 per Bbl of oil and 22.2% or $0.63 per Mcf of natural gas compared to the year ended December 31, 2018, which our operators received an average of $60.17 per Bbl of oil, $2.84 per Mcf of natural gas and $25.14 per Bbl of NGL. This change is consistent with prices experienced in the market, specifically when compared to the EIA average price decrease of 12.6% or $8.25 per Bbl of oil and 18.7% or $0.59 per Mcf of natural gas for the comparable periods.
Lease Bonus and Other Income
Lease bonus and other income was $0.3 million for the year ended December 31, 2020, a decrease of $2.2 million from $2.5 million for the year ended December 31, 2019. The decrease in lease bonus and other income is primarily due to the current volatility and uncertainty in the oil and gas market, which has discouraged operators from drilling new wells.
Our lease bonus and other income for the year ended December 31, 2019 increased by $1.3 million, from $1.2 million for the year ended December 31, 2018.
(Loss) Gain on Commodity Derivative Instruments
Loss on commodity derivative instruments for the year ended December 31, 2020 included $7.1 million of mark-to-market losses and $4.6 million of gains on the settlement of commodity derivative instruments compared to $3.4 million