| @ | i`j 1895`99|1960`62 |
@ | iaj 1959/60`68/69 |
@ | ibj @1971`81@ |
| @1895-99@ | 100 | @1959/60@ | 100 | @1970@ | 100 |
| 1900-04 | 102 | 1960/61 | 90 | 1972 | n.a. |
| 1905-09 | 98 | 1961/62 | 83 | 1973 | 105 |
| 1910-14 | 96 | 1962/63 | 94 | 1974 | n.a. |
| 1915-19 | 76 | 1963/64 | 103 | 1975 | 106 |
| 1920-24 | 74 | 1964/65 | 112 | 1976 | 108 |
| 1925-29 | 79 | 1965/66 | 105 | 1977 | 112 |
| 1930-34 | 73 | 1966/67 | 104 | 1978 | 124 |
| 1935-39 | 74 | 1967/68 | 107 | 1979 | 129 |
| 1940-44 | 64 | 1968/69 | 105 | 1980 | n.a. |
| 1945-49 | 69 | @ | @ | 1981 | 135 |
| 1950-54 | 73 | @ | @ | @ | @ |
| 1955-59 | 88 | @ | @ | @ | @ |
| 1960-62 | 95 | @ | @ | @ | @ |
ioj
i`jO'Brien (1968)
iajMongi (n.d.)
ibjJญอW{ฒธeNลฦ USAD,Strategies for Accelerating Agricultural Development (1981)ๆ่Mา์ฌ