| 991991 | - | 1 | = | 991990 |
| 991991 | - | 2 | = | 991989 |
| 991991 | - | 3 | = | 991988 |
| 991991 | - | 4 | = | 991987 |
| 991991 | - | 5 | = | 991986 |
| 991991 | - | 6 | = | 991985 |
| 991991 | - | 7 | = | 991984 |
| 991991 | - | 8 | = | 991983 |
| 991991 | - | 9 | = | 991982 |
| 991991 | - | 10 | = | 991981 |
| 991991 | - | 11 | = | 991980 |
| 991991 | - | 12 | = | 991979 |
| 991991 | - | 13 | = | 991978 |
| 991991 | - | 14 | = | 991977 |
| 991991 | - | 15 | = | 991976 |
| 991991 | - | 16 | = | 991975 |
| 991991 | - | 17 | = | 991974 |
| 991991 | - | 18 | = | 991973 |
| 991991 | - | 19 | = | 991972 |
| 991991 | - | 20 | = | 991971 |
| 991991 | - | 21 | = | 991970 |
| 991991 | - | 22 | = | 991969 |
| 991991 | - | 23 | = | 991968 |
| 991991 | - | 24 | = | 991967 |
| 991991 | - | 25 | = | 991966 |
| 991991 | - | 26 | = | 991965 |
| 991991 | - | 27 | = | 991964 |
| 991991 | - | 28 | = | 991963 |
| 991991 | - | 29 | = | 991962 |
| 991991 | - | 30 | = | 991961 |
| 991991 | - | 31 | = | 991960 |
| 991991 | - | 32 | = | 991959 |
| 991991 | - | 33 | = | 991958 |
| 991991 | - | 34 | = | 991957 |
| 991991 | - | 35 | = | 991956 |
| 991991 | - | 36 | = | 991955 |
| 991991 | - | 37 | = | 991954 |
| 991991 | - | 38 | = | 991953 |
| 991991 | - | 39 | = | 991952 |
| 991991 | - | 40 | = | 991951 |
| 991991 | - | 41 | = | 991950 |
| 991991 | - | 42 | = | 991949 |
| 991991 | - | 43 | = | 991948 |
| 991991 | - | 44 | = | 991947 |
| 991991 | - | 45 | = | 991946 |
| 991991 | - | 46 | = | 991945 |
| 991991 | - | 47 | = | 991944 |
| 991991 | - | 48 | = | 991943 |
| 991991 | - | 49 | = | 991942 |
| 991991 | - | 50 | = | 991941 |