Trends in global population size and life expectancy

Question 1

all age groups

• what pop size in 1950
• what size now
• what size in 2100

Answer 1

2.1 billion in 1950
7.5 billion now
11 billion then

Question 2

0-14 years

• what pop size in 1950
• what size in 2100
• describe trend

Answer 2

1 billion
2 billion
increase til 2100, then remain stable

Question 3

25-69 years

• what pop size in 1950
• what size in 2100
• describe trend

Answer 3

1 billion
6 billion
MODERATE increase, continued

Question 4

70+ years

• what pop size in 1950
• what size in 2100
• describe trend

Answer 4

0.1 billion
2 billion
SHARP increase, continued

Question 5

what is old age dependency ratio

Answer 5

(number of people over 70 / number of people 25-69)

Question 6

what happens to old age depenency ratio

Answer 6

SHARP increase

Question 7

trend in global fertility? (children per mother)

Answer 7

decrease

Question 8

trends in child and infant mortality?

Answer 8

decrease

Question 9

trends in life expectancy

• general
• sex specific

Answer 9

increase

females always above males

Question 10

what is the average life expectancy and what is the range?

Answer 10

73

53 –> 85

Question 11

define: coffin shaped population distribution

Answer 11

similar numbers of people from early to middle age

numbers decline at late age

Question 12

define: pyramid shaped population distribution

Answer 12

high numbers being born

numbers decline immediately

Question 13

population distribution (in terms of shape) for australia vs afghanistan (a developing country?) in 2018?

Answer 13

australia is coffin shaped

afghanistan is pyramid shaped

Question 14

population distribution (in terms of shape) for australia vs afghanistan (a developing country?) in 2100?

Answer 14

both are coffin shaped
though afghanistan is skewed to younger
and both have increased population sizes (fatter)