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Cash and cash equivalents | 12 Months Ended
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Dec. 31, 2018
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Cash and cash equivalents |
24. | Cash and cash equivalents
|  | 31 December 2018 |  |  | 31 December 2017 |
Cash in hand |  |  | 144 |  |  |  | 192 |
Banks |  |  | 7,413,113 |  |  |  | 4,712,141 |
- Demand deposits |  |  | 587,007 |  |  |  | 603,553 |
- Time deposits |  |  | 6,826,106 |  |  |  | 4,108,588 |
Other cash and cash equivalents |  |  | 5,982 |  |  |  | — |
Cash and cash equivalents |  |  | 7,419,239 |  |  |  | 4,712,333 |
As at 31 December 2018, the average effective interest rates of TL, USD and EUR time deposits are 22.5%, 5.9% and 3.3% (31 December 2017: 14.3%, 5.8% and 2.2%) respectively. As at 31 December 2018, average maturity of time deposits is 35 days (31 December 2017: 32 days).

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- Definition The disclosure of cash and cash equivalents. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
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