Escalation of Strikes, 1931-1941
| Year | Numbers of Disputes | Numbers of Workers | Man-Days Lost |
| 1931 |
894 | 279,209 | 6,386,183 |
| 1932 |
808 | 242,826 | 6,462,973 |
| 1933 | 1,562 | 812,137 | 14,818,846 |
| 1934 | 1,856 | 1,466,695 | 19,591,949 |
| 1935 | 1,898 | 1,141,363 |
15,641,329 |
| 1936 | 2,172 | 788,648 | 13,901,956 |
| 1937 | 4,740 |
1,860,621 | 28,425,000 |
| 1938 | 2,772 | 688,376 | 9,148,273 |
| 1939 | 2,613 | 1,170,962 | 17,812,219 |
| 1940 | 2,508 | 576,988 | 6,700,872 |
| 1941 | 4,288 |
2,362,620 | 23,047,556 |