Please answer the given financial question based on the context.
Context: |||Year ended December 31,||
||2017|2018|Change|
|Amounts in thousands of U.S. dollars||||
|Net cash provided by operating activities|$223,630|$283,710|$60,080|
|Net cash used in investing activities|(74,599)|(692,999)|(618,400)|
|Net cash provided by financing activities|7,265|368,120|360,855|
Year ended December 31, 2017 compared to the year ended December 31, 2018
The following table summarizes our net cash flows from operating, investing and financing activities for the years indicated:
Net Cash Provided By Operating Activities
Net cash provided by operating activities increased by $60.1 million, from $223.6 million during the year ended December 31, 2017 to $283.7 million during the year ended December 31, 2018. The increase was attributable to an increase in total revenues (revenues and net pool allocation) of $103.7 million, partially offset by a decrease of $23.5 million caused by movements in working capital accounts, an increase of $15.3 million in cash paid for interest including the interest paid for finance leases and a net decrease of $4.8 million from the remaining movements.
Net Cash Used In Investing Activities
Net cash used in investing activities increased by $618.4 million, from $74.6 million during the year ended December 31, 2017 to $693.0 million during the year ended December 31, 2018. The increase is mainly attributable to an increase of $591.5 million in payments for the construction costs of newbuildings and other fixed assets and a net decrease in cash from short-term investments of $43.0 million in 2018 compared to 2017. The above movements were partially offset by $14.0 million in payments made for the investment in Gastrade made in 2017 and an increase of $2.1 million in cash from interest income.
Net Cash Provided By Financing Activities
Net cash provided by financing activities increased by $360.8 million, from $7.3 million during the year ended December 31, 2017 to $368.1 million during the year ended December 31, 2018. The increase is mainly attributable to an increase of $244.2 million in proceeds from our borrowings, a decrease in bank loan and bond repayments of $165.3 million, an increase of $69.2 million in proceeds from the issuance of the Partnership’s Series B and Series C Preference Units in 2018 as compared to the issuance of 5,750,000 of its 8.625% Series A Cumulative Redeemable Perpetual Fixed to Floating Rate Preference Units (the ‘‘Partnership’s Series A Preference Units’’) in 2017 and an increase of
$20.6 million from payments during 2017 for CCS termination. The above movements were partially offset by a decrease of $81.1 million in proceeds from GasLog Partners’ common unit offerings and an increase of $57.0 million in dividend payments.
Question: What was the reason for the increase in net cash used in investing activities?
Answer:
The increase is mainly attributable to an increase of $591.5 million in payments for the construction costs of newbuildings and other fixed assets and a net decrease in cash from short-term investments of $43.0 million in 2018 compared to 2017