Viết lại câu theo cấu trúc: There was a/an + ADJ + N in [đối tượng] 2. The percentage of privately rented houses saw a quick rise of 10% in 2010 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. A sharp decline of 20% was seen in the sales of history books in 2009 8. A remarkable decrease of 35% was seen in the percentage of smokers during the period between 1990 and 2000 9. The year 1997 saw an increase of 30% in the percentage of heaters in households 10. In 2014, there was a noticeable decline in the number of engineering degrees 13. The house price in Hanoi went up gradually in 2005 14. During the 1980s and 1990s, there was a rapid increase to 10,000 in the number of visitors to the castle 15. In 2010, the percentage of people visiting the castle gradually went down to 30% 16. The proportion of tourists who visited the festival fluctuated slightly in 1985 17. The percentage of visitors to the zoo grew sharply by 20% in 2010 18. The percentage of Americans who followed vegetarian diets fell steadily in 1999 20. The population growth rate witnessed a slow rise of 2.5% in 1950 21. The year 1990 saw a quick drop in the unemployment rate 22. The number of buses went up moderately by 20% in 2006