| Trend | h | P-value | Z-statistics | Tau | Slope |
First decad (1981-1990) | Increasing | false | 0.41289 | 0.81883 | 0.05070 | 0.08884 |
Second decad (1991-2000) | Decreasing | false | 0.80472 | 0.24724 | 0.01541 | 0.02332 |
Third decad (2001-2010) | Increasing | false | 0.74566 | 0.32435 | 0.02016 | 0.03708 |
Fourth decad (2011-2020) | Increasing | false | 0.24828 | 1.15453 | 0.07143 | 0.16294 |
1981-2020 | Increasing | true | 0.01838 | 2.35781 | 0.07201 | 0.03545 |