Based on the given data, we can analyze the trends and behavior of the world population for the years 2000, 2005, 2010, and 2015 in terms of various factors such as population size, yearly changes, percentage yearly changes, median age, and fertility rates. Here are the detailed observations for each aspect:
1. World Population Increase:
- The population consistently increased from 6,126,622,121 in 2000 to 7,349,472,099 in 2015.
- This steady rise indicates a continuous growth in the global population throughout this period.
2. Yearly Change:
- The yearly change in population saw fluctuations but indicates an overall increase:
- 78,299,807 in 2000
- 78,602,746 in 2005
- 82,017,839 in 2010
- 83,949,411 in 2015
- There is a slight upward trend in the annual population increase, suggesting a growing difference between the populations of consecutive years.
3. Percentage Yearly Change:
- The percentage increase in population each year shows a gradual decline:
- 1.33% in 2000
- 1.25% in 2005
- 1.23% in 2010
- 1.18% in 2015
- This decrease indicates that while the population is increasing in absolute numbers, the rate at which it is growing is slowing down.
4. Median Age:
- The median age of the global population increased over these years:
- 26 years in 2000
- 27 years in 2005
- 29 years in 2010
- 30 years in 2015
- This indicates an aging population, where there is a relatively higher proportion of older people each year.
5. Fertility Rates:
- Fertility rates show a continuous decline:
- 2.74 in 2000
- 2.62 in 2005
- 2.56 in 2010
- 2.51 in 2015
- Lower fertility rates point toward smaller family sizes and potentially lower birth rates over the years.
To summarize, the following observations about the world population during the given timeframe are true:
- The world population increased each year.
- The yearly change in population growth slightly increased overall.
- The percentage yearly change in population growth gradually decreased.
- The median age of the global population increased steadily.
- The fertility rate consistently decreased.
