1820	36.4	1836	53.3
1821	36.7	1837	42.1
1822	37.0	1838	50.1
1823	35.4	1839	53.2
1824	38.4	1840	51.4
1825	38.9	1841	51.6
1826	31.5	1842	47.4
1827	37.2	1843	52.3
1828	36.8	1844	58.6
1829	35.8	1845	60.1
1830	38.3	1846	57.8
1831	37.2	1847	58.8
1832	36.5	1848	52.8
1833	39.7	1849	63.6
1834	41.6	1850	71.4
1835	47.4