TÜİK: One third of accommodation and restaurant spending is in Istanbul
According to TÜİK's household consumption expenditure data, Istanbul alone accounts for approximately one-third of Turkey-wide spending in the restaurant and accommodation category.

According to household consumption expenditure indicators published by the Turkish Statistical Institute (TÜİK), in the restaurant and accommodation expenditure category, approximately one third of the country's total volume falls to Istanbul's share.
This demonstrates a city's weight in the tourism and food service market: Istanbul concentrates a large portion of the funds spent by both local residents and visitors.
Source: turizmguncel.com — original article. DK Agency translated and shortened the story.