1. The number of people watching films onTV dropped significantly to 20% in 2015.

2. The percentage of privately rented homes saw a quick rise of 10% in 2010.

3. There was a moderate increase of 30 seconds in the average length of the advertisements in 2009.

4. The year 2017 saw a steady rise of $2million in the amount of salt exported.

5. The price of computers decreased gradually over the period.

6. The number of visitors to Hanoi experienced an upward trend in 2014.

7. The number of students studying two languages remained stable through the period.

8. A sharp decline of 20% was seen in the sales of history books in 2017.

9. There was a slight growth in the quality of food in supermarkets in 2009.

10. A remarkable decrease of 35% was seen in the percentage of smokers during the period between 1990 and 2000.

11. The year 1979 saw an increase of 30% in the percentage of heaters in households.

12. In 2014, there was a noticeable decline in the number of engineering degrees.

13. Iced coffee sales rose significantly to around 40 servings per day in December.

14. There was a slight drop to about 2,250 in the number of cell phones subscribers between 2005 and 2010.

15. The house price in Hanoi went up gradually in 2005.