Changes in area of the Ecological and Natural Map by PA and grade (km2)
| Year of PA | Ecological and Natural Map | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Area (km2) | Ratio (%) | ||||||||
| 1st | 2nd | 3rd | DMA | 1st | 2nd | 3rd | DMA | ||
| 2007 | 7,310.1 | 38,988.0 | 44,185.0 | 8,646.0 | 7.4 | 39.3 | 44.6 | 8.7 | |
| 2013 | 7,360.1 | 42,807.4 | 40,386.3 | 8,584.9 | 7.4 | 43.2 | 40.7 | 8.7 | |
| 2015 | 7,405.4 | 43,598.3 | 39,591.1 | 8,543.9 | 7.5 | 44.0 | 39.9 | 8.6 | |
| 2016 | 8,800.9 | 44,413.6 | 37,397.9 | 8,526.2 | 8.9 | 44.8 | 37.7 | 8.6 | |
| 2017 | 9,000.7 | 44,998.4 | 36,626.9 | 8,512.7 | 9.1 | 45.4 | 36.9 | 8.6 | |
| 2018 | 9,109.9 | 44,009.9 | 37,245.7 | 8,773.2 | 9.2 | 44.4 | 37.6 | 8.8 | |
| 2020 | 9,139.0 | 42,893.8 | 38,096.2 | 9,009.6 | 9.2 | 43.3 | 38.4 | 9.1 | |
| 2021 | 9,093.8 | 39,554.1 | 40,100.1 | 10,390.6 | 9.2 | 39.9 | 40.4 | 10.5 | |
| 2022 | 8,644.9 | 38,985.2 | 40,785.1 | 10,723.5 | 8.7 | 39.3 | 41.1 | 10.8 | |
| Average | 8,429.4 | 42,249.9 | 39,379.4 | 9,097.0 | 8.5 | 42.6 | 39.7 | 9.2 | |
PA: public announcement; DMA: distinct management area.