| County | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 1/ |
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| NORTH DISTRICT | ||||||
| Hunterdon | 2.0 | 3.1 | 1.9 | 2.0 | 1.8 | 2.1 |
| Morris | 2.2 | 2.8 | 1.7 | 2.1 | 1.9 | 2.0 |
| Somerset | 2.2 | 3.3 | 1.7 | 2.2 | 2.4 | 2.2 |
| Sussex | 2.3 | 3.2 | 1.7 | 2.1 | 2.0 | 2.2 |
| Warren | 2.2 | 3.2 | 2.1 | 2.7 | 2.7 | 2.3 |
| CENTRAL DISTRICT | ||||||
| Burlington | 2.2 | 2.2 | 2.1 | 2.8 | 2.2 | 2.4 |
| Mercer | 2.0 | 2.5 | 2.0 | 2.2 | 2.1 | 2.2 |
| Middlesex | 2.5 | 2.7 | 1.8 | 1.9 | 1.6 | 1.7 |
| Monmouth | 2.2 | 2.6 | 2.3 | 2.3 | 2.5 | 2.4 |
| Ocean | 1.9 | 1.7 | 1.8 | 1.7 | 1.5 | 1.6 |
| SOUTH DISTRICT | ||||||
| Atlantic | 2.4 | 1.5 | 1.1 | 1.5 | 1.5 | 1.8 |
| Camden | 2.4 | 1.6 | 2.2 | 1.9 | 2.0 | 2/ |
| Cape May | 2.1 | 1.7 | 1.8 | 1.6 | 1.6 | 2.2 |
| Cumberland | 2.2 | 1.8 | 1.8 | 2.4 | 2.6 | 2.5 |
| Gloucester | 2.5 | 2.2 | 2.1 | 2.3 | 2.3 | 2.4 |
| Salem | 2.6 | 1.9 | 2.1 | 2.5 | 2.6 | 2.6 |
| Other Counties | 2.5 | 3.4 | 1.9 | 2.4 | 2.9 | 2.9 |
| STATE | 2.19 | 2.85 | 1.93 | 2.28 | 2.19 | 2.24 |
| Production (tons) | ||||||
| NORTH DISTRICT | ||||||
| Hunterdon | 52,860 | 80,880 | 52,730 | 53,760 | 53,700 | 61,950 |
| Morris | 14,680 | 18,160 | 10,880 | 11,350 | 9,820 | 10,120 |
| Somerset | 21,940 | 35,260 | 18,020 | 24,690 | 30,400 | 24,410 |
| Sussex | 43,380 | 64,320 | 35,760 | 42,740 | 43,670 | 39,390 |
| Warren | 32,900 | 50,980 | 34,080 | 43,000 | 43,870 | 35,550 |
| CENTRAL DISTRICT | ||||||
| Burlington | 17,730 | 18,330 | 17,340 | 22,550 | 18,710 | 18,110 |
| Mercer | 7,220 | 9,340 | 7,480 | 8,170 | 8,850 | 9,550 |
| Middlesex | 4,310 | 4,110 | 2,640 | 1,900 | 2,240 | 2,720 |
| Monmouth | 11,620 | 13,300 | 11,830 | 12,240 | 13,880 | 12,030 |
| Ocean | 1,330 | 1,190 | 1,610 | 850 | 1,200 | 1,120 |
| SOUTH DISTRICT | ||||||
| Atlantic | 1,650 | 1,040 | 960 | 750 | 1,200 | 1,440 |
| Camden | 1,670 | 1,110 | 1,570 | 950 | 1,200 | 2/ |
| Cape May | 2,140 | 1,720 | 1,780 | 1,120 | 1,600 | 2,640 |
| Cumberland | 9,760 | 8,680 | 8,550 | 12,220 | 13,790 | 13,920 |
| Gloucester | 7,740 | 7,740 | 8,000 | 9,990 | 12,360 | 8,920 |
| Salem | 17,340 | 13,800 | 16,430 | 21,920 | 25,650 | 23,210 |
| Other Counties | 1,730 | 3,040 | 1,340 | 4,800 | 2,860 | 4,140 |
| STATE | 250,000 | 333,000 | 231,000 | 273,000 | 285,000 | 269,000 |