• 1930 to 1930 26
• 1931 to 1931 29
• 1932 to 1932 26
• 1933 to 1933 38
• 1934 to 1934 30
• 1935 to 1935 30
• 1936 to 1936 27
• 1937 to 1937 32
• 1938 to 1938 28
• 1939 to 1939 27