Table:
Year Ended

December 31,

2019	2018	2017

$	$	$

Realized gains (losses) on maturity and/or partial termination of cross currency swap	—	(42,271)	(25,733)

Realized losses	(5,062)	(6,533)	(18,494)

Unrealized (losses) gains	(13,239)	21,240	82,668

Total realized and unrealized (losses) gains on cross currency swaps	(18,301)	(27,564)	38,441

Examine the table in this image and extract any merged cell regions. Please format the merged cell regions as JSON {'top-left':(X, Y), 'bottom-right':(Z, W)}, with (X, Y) indicating the (row_id, column_id) of the top-left cell and (Z, W) the bottom-right cell in the merged regions. Remember that the X, Y, Z, W all start from 1.

This table does not contain any merged cells.