Table 2. Change matrix for importance value classes of pine at NFI permanent sample points over a 10-year period.
| NFI7 | Class1 | Class2 | Class3 | Class4 | Sum |
| NFI5 |
| Class1 | 1,061(75.0%) | 328(23.2%) | 24(1.7%) | 1(0.1%) | 1,414(100%) |
| Class2 | 53(5.1%) | 706(67.3%) | 274(26.1%) | 16(1.5%) | 1,049(100%) |
| Class3 | 4(0.3%) | 75(6.2%) | 877(72.0%) | 262(21.5%) | 1,218(100%) |
| Class4 | 0(0.0%) | 4(0.1%) | 106(1.9%) | 5,429(98.0%) | 5,539(100%) |