and one worked while t’other rested,

0.0000% 1926 1.166625 0.857173 6.5229% 1941 0.491090 2.036285 6.1527% 1940 0.048971 20.420348 2.3623% 1939 1.814325 0.551169 -1.5482% 1938 0.865769 1.155043 -1.5312% 1937 0.430924 2.320592 3.9669% 1936 1.853005 0.539664 0.0000% 1935 0.053392 18.729248 0.0000% 1935 0.057749 17.316241 0.0000% 1935 0.283793 3.523694 3.2811% 1934 0.060477 16.535146 8.9328% 1933 0.446206 2.241118 -2.6088% 1932 1.575334 0.634786 -11.5407% 1931 0.494296 2.023078 -8.4517% 1930 0.972633 1.028137 -2.7367% 1929 1.758937 0.568525 2.8137% 1921 1.972124 0.507067 -7.1894% 1920 2.124891 0.470612 1.3234% 1943 1.034288 0.966848 2.7232% 1942 2.194125 0.455763 6.5229%

mutate