Read 1785 Finland’s natural population in 1976

(1) From the chart analysis, it can be seen that in the first stage of Finland, the population birth rate is higher, the population death rate is higher, and the natural population growth rate is lower, so the population reproduction type is primitive.

(2) Reading the table, compared with the fourth stage, although the natural growth rate is lower in the first stage, the birth rate and death rate of the population in the first stage are both higher.

(3) As the level of social productivity increases, the type of population reproduction continues to change. From the first stage to the fourth stage, the population death rate gradually decreases, indicating that the transformation of the population in the production type is from population death to The rate started.

So the answer is: (1) "high-high-low" type; high birth rate, high death rate, low natural growth rate.

(2) The reasons for the low natural growth rate are different. The first stage is caused by high mortality (extremely low productivity), and the fourth stage is caused by low birth rate and low death rate (high productivity). performance of development).

(3) Gradual decline; decline; improvement in the level of social productivity.