pre_text: Our calculation of TCE may not be comparable to that reported by other entities. The following table reconciles our total operating revenues to average daily TCE: (i) "Voyage and commission expenses" is derived from the caption "Voyage, charterhire and commission expenses" and "Voyage, charterhire and commission expenses - collaborative arrangement" less (i) charterhire expenses (net of the effect of the related guarantee obligation) of $nil, $nil and $12.4 million for the years ended December 31, 2019, 2018 and 2017, respectively, which arose on the charter-back of the Golar Grand from Golar Partners, and (ii) voyage and commission expenses in relation to the Hilli Episeyo of $0.5 million, $1.4 million and $nil for the years ended December 31, 2019, 2018 and 2017, respectively. (5) We calculate average daily vessel operating costs by dividing vessel operating costs by the number of calendar days. Calendar days exclude those from vessels chartered in where the vessel operating costs are borne by the legal owner, and those of vessels undergoing conversion.
table: Years Ended December 31,
table: 2019 2018 2017 2016 2015
table: (in thousands of U.S.$, except number of shares, per common share data, fleet and other financial data)
table: Total operating revenues 448,750 430,604 143,537 80,257 102,674
table: Less: Liquefaction services revenue (218,096) (127,625) — — —
table: Less: Vessel and other management fees (21,888) (24,209) (26,576) (14,225) (12,547)
table: Net time and voyage charter revenues 208,766 278,770 116,961 66,032 90,127
table: Voyage and commission expenses (i) (38,381) (104,463) (48,933) (25,291) (23,434)
table: 170,385 174,307 68,028 40,741 66,693
table: Calendar days less scheduled off-hire days 3,840 3,987 3,885 4,034 4,481
table: Average daily TCE rate (to the closest $100) 44,400 43,700 17,500 10,100 14,900
question: Analyse this data from a financial earnings document. What was the change in total operating revenues from 2016 to 2017?