measure means a natural clearing in the world. Meanwhile

1934 0.807940 1.237715 8.9328% 1933 0.055518 18.012195 -2.6088% 1932 1.553983 0.643508 -11.5407% 1931 0.050930 19.634956 -8.4517% 1930 1.774955 0.563395 -7.1894% 1920 0.062338 16.041473 1.3234% 1943 0.305056 3.278089 2.7232% 1942 2.041543 0.489826 -2.0001% 1925 0.159574 6.266701 0.6731% 1924 0.973828 1.026875 2.0549% 1923 2.085718 0.479451 0.0000%

discreditable