Year	Millions Of Passengers
1911	22.5020
1912	23.5570
1913	26.1320
1914	25.0460
1915	25.5460
1916	27.8660
1917	32.2610
1918	28.7510
1919	37.3460
1920	39.2550
1921	31.2250
1922	31.7480
1923	34.2490
1924	34.0860
1925	35.5260
1926	36.0730
1927	35.1970
1928	33.9240
1929	33.4340
1930	29.3600
1931	22.9850
1932	15.7500
1933	13.7170
1934	15.1050
1935	15.4790
1936	17.1980
1937	17.7450