รายละเอียดตัวอย่าง

The provided bar chart illustrates the number of families in the US in terms of earning annual income in 4 - year intervals started in 2007 and ended in 2015. Overall, It was clearly seen that the number of families whose wages were $50,000 to $74,999 was stable over the concerned period. In contrast, the count of households which had incomes less than $50,000 or above $74,000 experienced fluctuations through the shown period. To begin with the year 2007, the peak of families’ numbers was those who earned money over $100,000. Moreover, the range of wages which was from $75,000 to $99,999 took the lowest level in that year by almost 14 million in households’ count. In addition, there were 27 million families who were receiving money ranged from $25,000 to $49,999. Finally, there were 25 million households whose incomes were less than $25,000. After four years, the category of ($25,000-$49,999) was the highest number by around 30 million families, consequently, this category increased in 2011. Additionally, there was a small decline in families who had salary range from $75,000 to $99,999. For the two other categories (less than $25,000 and $100,000 or more), there were two changes: increase and decrease, respectively by nearly 3 million families. In 2015, the two groups of ($75,000-$99,999 and $100,000 or more) recovered the decline and increased again to reach 15 and 33 million households, respectively. On the other hand, the remaining segments of (less than $25,000 and $25,000-$49,999) fell to around 27 and 28 million.