1918

286.37

281.16

−0.5

288.48

−0.21

301.05

1919

286.41

281.32

−0.34

288.48

−0.21

301.23

1920

286.43

281.31

−0.35

288.51

−0.18

301.42

1921

286.50

281.52

−0.14

288.52

−0.17

301.60

1922

286.42

281.41

−0.25

288.45

−0.24

302.25

1923

286.40

281.37

−0.29

288.45

−0.24

302.90

1924

286.42

281.41

−0.25

288.45

−0.24

303.55

1925

286.48

281.51

−0.15

288.5

−0.19

304.20

1926

286.58

281.64

−0.02

288.59

−0.1

304.85

1927

286.48

281.43

−0.23

288.53

−0.16

305.50

1928

286.47

281.51

−0.15

288.49

−0.2

305.64

1929

286.33

281.17

−0.49

288.42

−0.27

305.76

1930

286.55

281.54

−0.12

288.58

−0.11

305.91

1931

286.61

281.67

−0.01

288.61

−0.08

306.05

1932

286.53

281.64

−0.02

288.52

−0.17

306.19

1933

286.40

281.31

−0.35

288.47

−0.22

306.33

1934

286.55

281.6

−0.06

288.56

−0.13

306.46

1935

286.50

281.48

−0.18

288.54

−0.15

306.60

1936

286.54

281.53

−0.13

288.57

−0.12

306.76

1937

286.64

281.63

−0.03

288.68

−0.01

306.93

1938

286.63

281.82

0.16

288.59

−0.1

307.09

1939

286.66

281.74

0.08

288.66

−0.03

307.25

1940

286.82

281.73

0.07

288.89

0.2

307.41

1941

286.93

281.75

0.09

289.04

0.35

307.58

1942

286.77

281.71

0.05

288.82

0.13

307.74

1943

286.76

281.72

0.06

288.81

0.12

307.90

1944

286.94

281.85

0.19

289.01

0.32

308.38

1945

286.85

281.58

−0.08

288.99

0.3

308.86

1946

286.65

281.66

−0.01

288.68

−0.01

309.34

1947

286.62

281.7

0.04

288.62

−0.07

309.82

1948

286.60

281.71

0.05

288.59

−0.1

310.30

1949

286.58

281.59

−0.07

288.61

−0.08

310.76

1950

286.50

281.33

−0.33

288.6

−0.09

311.26

1951

286.66

281.6

−0.06

288.71

0.02

311.74