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Protected areas established in 1919 Protected areas established in 1918 Protected areas established in 1917 Protected areas established in 1916 Protected areas established in 1915 Protected areas established in 1914 Protected areas established in 1913 Protected areas established in 1912 Protected areas established in 1911 Protected areas established in 1910 Protected areas established in 1909 Protected areas established in 1908 Protected areas established in 1907 Protected areas established in 1906 Protected areas established in 1905 Protected areas established in 1904 Protected areas established in 1903 Protected areas established in 1902 Protected areas established in 1901 Protected areas established in 1900 Protected areas established in 1899 Protected areas established in 1898 Protected areas established in 1897 Protected areas established in 1896 Protected areas established in 1895 Protected areas established in 1894 Protected areas established in 1893 Protected areas established in 1892 Protected areas established in 1891 Protected areas established in 1890 Protected areas established in 1889 Protected areas established in 1888 Protected areas established in 1887 Protected areas established in 1886 Protected areas established in 1885 Protected areas established in 1883 Protected areas established in 1882 Protected areas established in 1881 Protected areas established in 1880 Protected areas established in 1879 Protected areas established in 1877 Protected areas established in 1875 Protected areas established in 1874 Protected areas established in 1873 Protected areas established in 1872 Protected areas established in 1871 Protected areas established in 1870 Protected areas established in 1869 Protected areas established in 1868 Protected areas established in 1867 Protected areas established in 1863 Protected areas established in 1862 Protected areas established in 1856 Protected areas established in 1854 Protected areas established in 1853 Protected areas established in 1852 Protected areas established in 1846 Protected areas established in 1845 Protected areas established in 1844 Protected areas established in 1843 Protected areas established in 1842 Protected areas established in 1837 Protected areas established in 1816 Protected areas established in 1810 Protected areas established in 1787 Protected areas established in 1764